Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham xuc » cam xuc, chat xuc, cham soc
dang xay » dang van, van xay
hanh lai » hanh lam, hanh tai, thanh lap
cua tre » cua te, cuu tre, dua tren
va hanh » van hanh, va thanh, va danh
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va cham » va chat, va tham
xuc va » duc va, tuc va, luc va

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: so sach ky ((nang x) OR (dang xay)) hoi. hieu va cham xuc va hanh lai ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky ((nang x) or (dang xay)) hoi. hieu va cham xuc va hanh lai ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: so sach ky ((nang x) or (dang xay)) hoi. hieu va cham xuc va hanh lai ((cua tre) OR (cua triet))*.