Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach kem » hanh kem
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, dua tren
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
va hoi » xa hoi, va hoc, va hoa
ve cac » va cac, vien cac

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 kem) or (sach ty)) hang va hoi. hieu ve cac xuc van hanh tai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach kem) OR (sach ty)) hang va hoi. hieu ve cac xuc van hanh tai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach kem) or (sach ty)) hang va hoi. hieu ve cac xuc van hanh tai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su ((sach kem) or (sach ty)) hang va hoi. hieu ve cac xuc van hanh tai ((cua tre) OR (cua triet))*.