Perhaps you should try some spelling variations:
cong thanh » dong thanh, truong thanh
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tang » hanh trang, anh tang, hanh mang
tang cua » mang cua, hang cua, tang luan
cua hang » cua dang, cua nhung, cua cong
cong tan » cong tac, cong san, cong ty
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 hieu lang - hanh tang cua hang ((cong tan) or (((cong thanh) OR (cong trinh)))) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - hanh tang cua hang ((cong tan) OR (((cong thanh) OR (cong trinh)))) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - hanh tang cua hang ((cong tan) or (((cong thanh) OR (cong trinh)))) toan cao".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - hanh tang cua hang ((cong tan) or (((cong thanh) OR (cong trinh)))) toan cao*.