Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
hieu va » lieu va, hieu qua
cam cuc » cam xuc, cham cuu, pham cuc
cuc ban » cua ban, cac ban, cuu ban
ban anh » ban hanh, ban banh, ban danh
cua tre » cua te, cuu tre, dua tren
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: su sach tu nang ((xa hoi) or (x ho)). hieu va cam cuc ban anh d ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu nang ((xa hoi) OR (x ho)). hieu va cam cuc ban anh d ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: su sach tu nang ((xa hoi) or (x ho)). hieu va cam cuc ban anh d ((cua tre) or (cua triet))*.