Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dang xay » dang van, van xay
cua tre » cua te, cuu tre, dua tren
van anh » van thanh, tuan anh, van minh
xuc van » duc van, luc van, xuc ban
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
anh vi » hanh vi, anh va, anh ve

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((nang ma) or (dang xay)) hoi. hieu ve cam xuc van anh vi ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang ma) OR (dang xay)) hoi. hieu ve cam xuc van anh vi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang ma) or (dang xay)) hoi. hieu ve cam xuc van anh vi ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang ma) or (dang xay)) hoi. hieu ve cam xuc van anh vi ((cua tre) OR (cua triet))*.