Perhaps you should try some spelling variations:
dung chung » dung cong, dung ung, dung trung
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
chung bai » nhung bai, cung bai, chung bat
tinh cua » trinh cua, sinh cua, tinh chat
cua dung » cua dang, cua dong, qua dung
bai toan » bai tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - hanh tinh cua dung chung bai toan ban~.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh tinh cua dung chung bai toan ban*.