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

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 tran tranh nhung cong ((tac toan) OR (tam toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - hanh tran tranh nhung cong ((tac toan) OR (tam toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (thien anh)) - hanh tran tranh nhung cong ((tac toan) OR (tam toan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - hanh tran tranh nhung cong ((tac toan) OR (tam toan)) cao*.