Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh va » trinh van, trinh vat, trinh ve
cong dan » huong dan, cong dong, cong tac
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan ban » van ban
o ha » _ ha
y ha » ly ha

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

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