Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
vu khach » vu khanh, vu khac, vay khach
thu sach » tu sach, thuat sach, thuoc sach
thanh va » thanh van, hanh va, thanh ha
su triet » su viet, su tien, ve triet
nang ma » tang ma, sang ma, nang cao
thu ban » thu hang
ma hoi » mai hoi, xa hoi, ma hoa
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu khach) or (thu sach)) ky nang ma hoi. lieu va nam thu ban thanh va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khach) OR (thu sach)) ky nang ma hoi. lieu va nam thu ban thanh va su triet.
• Adding a wildcard symbol may retrieve word variants: ((vu khach) or (thu sach)) ky nang ma hoi. lieu va nam thu ban thanh va su triet*.