Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu tinh » chieu tinh, lieu tinh, kieu tinh
doc hieu » toc thieu, hoc thieu, hoc hien
cua hang » cua nhung, cua cong, cua ban
cua dang » cua cong, cua ban
cong dan » cong san, cong tan, huong dan
toan cao » toan tap
toan ban » van ban

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

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