Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
thiet yeu » thiet ke, theo yeu
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
yeu tinh » yeu tin, lieu tinh, kieu tinh
tang cua » mang cua, hang cua, tang luan
cong tac » cong ty
toan cao » toan ban
toan tap » toan ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thiet yeu tinh - hanh tang cua nhung ((cong thanh) or (cong tac)) ((toan cao) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thiet yeu tinh - hanh tang cua nhung ((cong thanh) OR (cong tac)) ((toan cao) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thiet yeu tinh - hanh tang cua nhung ((cong thanh) or (cong tac)) ((toan cao) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: thiet yeu tinh - hanh tang cua nhung ((cong thanh) or (cong tac)) ((toan cao) OR (toan tap))*.