Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
hoc thieu » toc thieu, hoc hien
cua thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
anh tang » anh bang, anh dang, anh nang
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) or (theo chieu)) xanh - anh tang ((cua thong) or (cua khong)) cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (theo chieu)) xanh - anh tang ((cua thong) OR (cua khong)) cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (theo chieu)) xanh - anh tang ((cua thong) or (cua khong)) cong tac toan cao*.