Perhaps you should try some spelling variations:
tranh nhung » trinh nhung, tranh hang, tran hung
thieu xanh » chieu xanh, hieu manh, thien danh
tram tranh » tran thanh, tap tranh
nhung cong » dung cong, thong cong, hang cong
thien anh » thien danh, tien anh, thien thanh
hanh tram » hanh tam, hanh trang, thanh tran
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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 (thien anh)) - hanh tram tranh nhung cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - hanh tram tranh nhung cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - hanh tram tranh nhung cong tac toan cao*.