Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
xang ma » tang ma, nang ma, sang ma
te sach » toc sach
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa
loc va » hoc va
luc va » duc va, tuc va
vi cuu » vi luu, vinh cuu

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) or (te sach)) ty xang ma hoi. hieu ve cham ((loc va) or (luc va)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (te sach)) ty xang ma hoi. hieu ve cham ((loc va) OR (luc va)) hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (te sach)) ty xang ma hoi. hieu ve cham ((loc va) or (luc va)) hanh vi cuu tre*.