Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cham vuc » cham soc, pham duc, cham cuu
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
van han » van hanh, van phan, van nhan
tai va » thai va, mai va, tri va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang x hoi. hieu ve cham vuc ((van han) or (ban thanh)) tai va (thiet or thieu)~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang x hoi. hieu ve cham vuc ((van han) OR (ban thanh)) tai va (thiet OR thieu).
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x hoi. hieu ve cham vuc ((van han) or (ban thanh)) tai va (thiet or thieu)*.