Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
chieu sang » chieu sach, chieu xanh, hieu lang
dung chung » dung cong, dung ung, dung trung
tranh cua » doanh cua, manh cua
cua dung » cua dang, cua dong, qua dung
la phan » va phan, a phan, li phan
ly phan » ly nhan, duy phan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (chieu sang)) - canh tranh cua dung chung ((la phan) or (ly phan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu sang)) - canh tranh cua dung chung ((la phan) OR (ly phan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu sang)) - canh tranh cua dung chung ((la phan) or (ly phan)) cau*.