Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
lai cua » hai cua, lai chau, thai cua
va cam » va cham, va cac, va cao
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) or (lang xa)) hoi. hieu va cam tuc va hanh ((lai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang x) OR (lang xa)) hoi. hieu va cam tuc va hanh ((lai cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang x) or (lang xa)) hoi. hieu va cam tuc va hanh ((lai cua) or (dai cua)) tre*.