Perhaps you should try some spelling variations:
"nhung thoi quan van. doi tuong hoi mo" » "nhung thi quan van. doi tuong hoi mo", "phung thi quan van. doi tuong hoi mo", "nhung loi quan van. doi tuong hoi mo", "nhung thoi quen van. doi tuong hoi mo", "nhung thong quan van. doi tuong hoi mo", "nhung thoi quan van. moi truong hoi mo", "nhung thoi quan van. doi song hoi mo", "nhung thoi quan van. doi truong hoi mo", "nhung thoi quan van. doi tuong ho mo", "nhung thoi quan van. doi duong hoi mo", "nhung thoi luan van. doi tuong hoi mo", "nhung thoi quan va. doi tuong hoi mo", "nhung thoi quan luan. doi tuong hoi mo", "nhung thoi quan van. doi tuong hoi mot", "nhung thoi quan van. doi tuong hoi co", "nhung thoi quan van. doi tuong hoi o"
"nhung thon quyet van. noi dung hoc mo" » "nhung thanh quyet van. noi dung hoc mo", "chung thong quyet van. noi dung hoc mo", "nhung chong quyet van. noi dung hoc mo", "nhung theo quyet van. noi dung hoc mo", "nhung thon huyen van. noi dung hoc mo", "nhung thon quyet van. hoc dung hoc mo", "nhung thon quyet van. noi dong hoc mo", "nhung thon quyet van. noi dung thuoc mo", "nhung thon quyet van. noi trung hoc mo", "nhung thon quyet van. noi dung hoc moi", "nhung thon quyet van. noi dung hoc mot", "nhung thon quyet van. noi dung hoc mon"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("nhung thoi quan van. doi tuong hoi mo") or ("nhung thon quyet van. noi dung hoc mo"))~.
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• Adding a wildcard symbol may retrieve word variants: (("nhung thoi quan van. doi tuong hoi mo") or ("nhung thon quyet van. noi dung hoc mo"))*.