Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
cuu tre » cua tre, cau tren, cau treo
xuc van » duc van, luc van, vuc van
cao xuc » cam xuc, cao duc, cao suc
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
cao hoi » cau hoi, co hoi, cao hoc
ty nang » ky nang, ty hang, ly nang
va cao » va cac, va co, va dao

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 ((ty nang) or (ty xang)) cao hoi. hieu va cao xuc van hanh vi ((cuu tre) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ty xang)) cao hoi. hieu va cao xuc van hanh vi ((cuu tre) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) or (ty xang)) cao hoi. hieu va cao xuc van hanh vi ((cuu tre) or (va triet))*.