Perhaps you should try some spelling variations:
khong cong » thong cong, khong cang, chong cong
hanh tang » hanh trang, anh tang, hanh mang
thi phap » theo phap, thi hai, thi ha
he khong » he thong
cong tac » cong ty
tran cau » tran chau, ran cau, tra cau
toan cau » toan cao, toan ban, toan tap
theo ha » theo phap, theo chu, thep nha
tang he » tang le, tang ha, bang he

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo ha) or (thi phap)) tinh - hanh tang he khong cong tac ((tran cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo ha) OR (thi phap)) tinh - hanh tang he khong cong tac ((tran cau) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: ((theo ha) or (thi phap)) tinh - hanh tang he khong cong tac ((tran cau) or (toan cau))*.