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 vi » hanh vi, thanh va, thanh ve
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
thu ban » thu hang
va nam » van nam, ha nam, va nay
vi su » va su, ve su, ki su

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