Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
van thanh » van tuan
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, dua tren
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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 ly nang x hoi. hieu va cam xuc ((van thanh) or (ban thanh)) san ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang x hoi. hieu va cam xuc ((van thanh) OR (ban thanh)) san ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ly nang x hoi. hieu va cam xuc ((van thanh) or (ban thanh)) san ((cua tre) or (cua triet))*.