Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
su sach » so sach, vu sach
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (su sach)) ky tang xa hoi. hieu ve cham tuc va hanh ((vi cua) or (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (su sach)) ky tang xa hoi. hieu ve cham tuc va hanh ((vi cua) OR (hai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (su sach)) ky tang xa hoi. hieu ve cham tuc va hanh ((vi cua) or (hai cua)) tre*.