Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lam » thanh lap, hanh kem, hanh va
toc sach » hoc sach, doc sach, thuoc sach
va nang » van nang, da nang, cam nang
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, dua tren
luc va » duc va, tuc va, loc va
v nang » vu nang, van nang, voi nang
va cam » va cham, va cac, va cao

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