Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
nang ho » nang hoc, nang co, nang cao
tang ho » tang cho, tung ho, tang ha
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
ban san » ban soan, ban dan, ban can
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang ho) OR (tang ho)) hoi. hieu va cam xuc van ban san ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang ho) OR (tang ho)) hoi. hieu va cam xuc van ban san ((cua tre) or (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang ho) OR (tang ho)) hoi. hieu va cam xuc van ban san ((cua tre) or (cua triet))*.