Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
cham tuc » nham thuc, pham thuc, cham soc
te sach » toc sach
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
vi cua » di cua

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: te sach v nang xa hoi. hieu va ((cham tuc) OR (tham thuc)) va danh ((vi cua) OR (vai cua)) vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang xa hoi. hieu va ((cham tuc) or (tham thuc)) va danh ((vi cua) OR (vai cua)) vat~".
• Adding a wildcard symbol may retrieve word variants: te sach v nang xa hoi. hieu va ((cham tuc) or (tham thuc)) va danh ((vi cua) OR (vai cua)) vat*.