Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
cuu tre » cau tren, cau treo
van hai » van ha, van chat, van hanh
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
ty nang » ky nang, ty xang, ty hang
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cua triet, dua tren
va cam » va cham, va cac, va cao
s_ hai » su hai, so hai
tuc va » thuc va, truc va, tuc xa

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: tu sach ty nang ((_ hai) OR (s_ hai)). hieu va cam tuc va van hai ((cuu tre) OR (cua tre))~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((_ hai) or (s_ hai)). hieu va cam tuc va van hai ((cuu tre) or (cua tre))*.