Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hanh trinh » canh tranh, hanh chinh
toc thien » toc thieu, ton thien, duoc thien
trinh cua » tinh cua, trinh luat, trinh quan
cua khong » hua khong, cua phuong, cua thuong
thanh ban » thanh san, thanh van, thanh bac
cong tan » cong tac, cong san, cong thanh
than ban » toan ban, than man, nhuan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thien hach - hanh trinh cua khong ((cong tan) or (huong dan)) ((than ban) OR (thanh ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thien hach - hanh trinh cua khong ((cong tan) OR (huong dan)) ((than ban) OR (thanh ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thien hach - hanh trinh cua khong ((cong tan) or (huong dan)) ((than ban) OR (thanh ban))".
• Adding a wildcard symbol may retrieve word variants: toc thien hach - hanh trinh cua khong ((cong tan) or (huong dan)) ((than ban) OR (thanh ban))*.