Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh hang » thanh hoang, thanh thang, tranh hang
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
cong tac » cong ty
toan cao » toan 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: hoc thieu xanh - thanh hang va nhung cong tac ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh hang va nhung cong tac ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh hang va nhung cong tac ((toan cao) or (toan ban))*.