Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu hien » bieu hien, dieu hien, chieu chien
hien cac » thien cac, vien cac, hieu cac
va thanh » gia thanh, va tinh, le thanh
doc sach » hoc sach, toc sach, nuoc sach
vai cua » dai cua, hai cua, lai cua
tu sach » thu sach, su sach, te sach
cac lo » cac lop, cac co, cac bo
cua tu » cua tuc, cua su, cua cu
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: ((tu sach) or (doc sach)) ky nang x hoi. hieu hien cac lo ((va thanh) or (ban thanh)) vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (doc sach)) ky nang x hoi. hieu hien cac lo ((va thanh) OR (ban thanh)) vai cua tu.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (doc sach)) ky nang x hoi. hieu hien cac lo ((va thanh) or (ban thanh)) vai cua tu*.