Perhaps you should try some spelling variations:
trong tranh » trong thanh, trong trang, trong nganh
thieu xanh » chieu xanh, hieu manh, thien danh
tran tranh » tran thanh, trang trinh, tan tran
nhung cong » dung cong, thong cong, hang cong
thien anh » thien danh, tien anh, thien thanh
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 ((tran tranh) OR (trong 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 ((tran tranh) OR (trong tranh)) nhung cong tac toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (thien anh)) - hanh ((tran tranh) OR (trong tranh)) nhung cong tac toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - hanh ((tran tranh) OR (trong tranh)) nhung cong tac toan cao*.