Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu van
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
va danh » va dinh, va dan, va hanh
hai cua » thai cua, dai cua, lai cua
hoi cua » hoi chuc
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang x ho. ((hieu ve) or (hieu va)) cam tuc va danh ((hai cua) OR (hoi cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x ho. ((hieu ve) OR (hieu va)) cam tuc va danh ((hai cua) OR (hoi cua)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x ho. ((hieu ve) or (hieu va)) cam tuc va danh ((hai cua) OR (hoi cua)) tu".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x ho. ((hieu ve) or (hieu va)) cam tuc va danh ((hai cua) OR (hoi cua)) tu*.