Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
ty nang » ky nang, ty hang, ly nang
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, xuc ban
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 ((ty nang) or (ty xang)) cau hoi. hieu va cam xuc van hanh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ty xang)) cau hoi. hieu va cam xuc van hanh vi ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) or (ty xang)) cau hoi. hieu va cam xuc van hanh vi ((cua tre) or (cua triet))*.