Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
van lanh » van anh, van hanh, van manh
hieu van » hieu va, thien van, lieu va
tuc van » thuc van, truc van, tuc va
cac tuc » cac toc, cac tu, cac tac
van cac » van hac, van cau, van bac
lai hoi » dai hoi, lai hoa, lai roi
vu sach » vu bach, su sach, vu khach
ma hoi » mai hoi, xa hoi, ma hoa
dao su » dao suu, dan su, cao su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (vu sach)) ky nang ((ma hoi) or (lai hoi)). hieu van cac tuc van lanh dao su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (vu sach)) ky nang ((ma hoi) OR (lai hoi)). hieu van cac tuc van lanh dao su triet.
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (vu sach)) ky nang ((ma hoi) or (lai hoi)). hieu van cac tuc van lanh dao su triet*.