Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, va hanh
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: su sach ky nang x hoi. hieu van pham duc ((ban thanh) or (va danh)) ((vi cua) or (vai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu van pham duc ((ban thanh) OR (va danh)) ((vi cua) OR (vai cua)) te.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu van pham duc ((ban thanh) or (va danh)) ((vi cua) or (vai cua)) te*.