Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hien anh » hien hanh, thien anh, dien anh
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, than cap
toan cao » toan ban, toan tap
va hang » van hang, va lang, va hanh
va nang » van nang, da nang, cam nang

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 anh - hanh trinh ((va hang) OR (va nang)) cong dan ((than cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien anh - hanh trinh ((va hang) OR (va nang)) cong dan ((than cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien anh - hanh trinh ((va hang) OR (va nang)) cong dan ((than cau) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc hien anh - hanh trinh ((va hang) OR (va nang)) cong dan ((than cau) or (toan cao))*.