Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hien sang » hien trang, khien bang, chieu sang
trinh cua » tinh cua, trinh luat, trinh quan
cong hai » cong thai, hoang hai, cong tac
cong san » cong tac
toan cao » toan ban, toan tap
cong ha » cong hoa, dong ha, cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien sang - hanh trinh cua cong ((((cong ha) or (cong hai))) or (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sang - hanh trinh cua cong ((((cong ha) OR (cong hai))) OR (cong san)) toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hien sang - hanh trinh cua cong ((((cong ha) or (cong hai))) or (cong san)) toan cao*.