Perhaps you should try some spelling variations:
te sach » toc sach
nam tuc » nam thuc, nam truc, nam thuoc
xa hanh » xa thanh, xa khanh, va hanh
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
ma hoi » mai hoi, xa hoi, ma hoa
nam tu » nam thu, nam thuc
vi cua » vai cua
di cua » dai cua, doi cua, de 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 ky nang ma hoi. hieu va ((nam tuc) OR (nam tu)) xa hanh ((vi cua) OR (di cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoi. hieu va ((nam tuc) OR (nam tu)) xa hanh ((vi cua) or (di cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. hieu va ((nam tuc) OR (nam tu)) xa hanh ((vi cua) or (di cua)) tre*.