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 luc » cam xuc, cau luc
va danh » va dinh, va dan, va hanh
doi cua » hoi cua
luc va » duc va, tuc va, loc va

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 luc va danh ((doi cua) or (dai cua)) tre~.
• 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 luc va danh ((doi cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x ho. ((hieu ve) or (hieu va)) cam luc va danh ((doi cua) or (dai cua)) tre*.