Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
nham thuc » nhan thuc, nam thuc, nham thu
doc sach » hoc sach, toc sach, nuoc sach
thuc ban » thuoc ban, thuc dan, thu ban
hieu ve » hieu va, hieu van
ve nham » ve nha, ve cham
vai cua » dai cua, hai cua, lai cua
vi cua » di cua
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 bach) or (doc sach)) ky nang x hoi. hieu ve nham thuc ban thanh ((vi cua) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu bach) OR (doc sach)) ky nang x hoi. hieu ve nham thuc ban thanh ((vi cua) OR (vai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((vu bach) or (doc sach)) ky nang x hoi. hieu ve nham thuc ban thanh ((vi cua) or (vai cua)) tre*.