Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
mai hoi » mai khoi, dai hoi, lai hoi
cam loc » cam lo
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ty sang » ty xang, ty hang, duy sang
cua tre » cua te, cuu tre, cua triet
ma hoi » xa hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam
loc va » hoc va, luc va
anh va » hanh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty sang ((ma hoi) or (mai hoi)). hieu ve cam loc va ((hanh vi) or (anh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty sang ((ma hoi) OR (mai hoi)). hieu ve cam loc va ((hanh vi) OR (anh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ty sang ((ma hoi) or (mai hoi)). hieu ve cam loc va ((hanh vi) or (anh va)) cua tre*.