Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
canh trinh » canh tranh, hanh trinh, canh tinh
hoa thanh » hoan thanh, ha thanh, hoc thanh
van thanh » ban thanh, van tuan
cong dan » cong san, cong tan, huong dan
than cap » khan cap, thanh lap, thanh cac
khan ap » khan cap, han ap, khan dam

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 nhanh - canh trinh ((hoa thanh) or (van thanh)) cong dan ((khan ap) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - canh trinh ((hoa thanh) OR (van thanh)) cong dan ((khan ap) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - canh trinh ((hoa thanh) or (van thanh)) cong dan ((khan ap) or (than cap))*.