Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, ban thanh, va tinh
toc sach » hoc sach, doc sach, thuoc sach
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, dua tren
va hanh » van hanh, va danh, ban hanh
va cam » va cham, va cac, va cao
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach v nang xa hoi. hieu va cam luc ((va hanh) OR (va thanh)) lam ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach v nang xa hoi. hieu va cam luc ((va hanh) OR (va thanh)) lam ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach v nang xa hoi. hieu va cam luc ((va hanh) OR (va thanh)) lam ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: toc sach v nang xa hoi. hieu va cam luc ((va hanh) OR (va thanh)) lam ((cua tre) or (cua triet))*.