Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, da thanh
cam thuc » am thuc, nam thuc, cam thu
thuc day » thuc dan, thuc vat
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
so sanh » do sanh
vi cua » di cua
ve cam » ve cham, ve cac, va cam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) ky nang xa hoi. hieu ve cam thuc day thanh ((vi cua) OR (vai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) ky nang xa hoi. hieu ve cam thuc day thanh ((vi cua) OR (vai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) ky nang xa hoi. hieu ve cam thuc day thanh ((vi cua) OR (vai cua)) tre*.