Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dua tren » dung tren
van lanh » van anh, van hanh, van manh
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cua triet, cua thep
ky tang » ky nang, ky dang, kho tang
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky tang xa hoi. hieu va cac xuc van lanh dao ((((cua tre) or (dua tren))) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky tang xa hoi. hieu va cac xuc van lanh dao ((((cua tre) OR (dua tren))) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky tang xa hoi. hieu va cac xuc van lanh dao ((((cua tre) or (dua tren))) or (cuu tre))*.