Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
cong thanh » dong thanh, cong trinh, cong tan
thiet yeu » thiet ke, theo yeu
hanh nang » anh nang, ganh nang, hanh mang
cao hang » cao dang, cao tang, cao bang
cong dan » cong san, cong tan, huong dan
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: ((theo chieu) or (thiet yeu)) xanh - hanh nang cao hang ((cong dan) or (cong thanh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (thiet yeu)) xanh - hanh nang cao hang ((cong dan) OR (cong thanh)) toan cao.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (thiet yeu)) xanh - hanh nang cao hang ((cong dan) or (cong thanh)) toan cao*.