Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach kem » hanh kem
hang tai » hang va, dung tai
nang cau » nang cao, hang cau, nang dau
cua tre » cua te, cuu tre, dua tren
va hang » van hang, va nang, va lang
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va

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)) nang cau hoi. hieu ve cam xuc va hang 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)) nang cau hoi. hieu ve cam xuc va hang 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)) nang cau hoi. hieu ve cam xuc va hang tai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su ((sach kem) or (sach ty)) nang cau hoi. hieu ve cam xuc va hang tai ((cua tre) OR (cua triet))*.