Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
qua cham » qua hai, qua cac, va cham
dua tren » dung tren
tu sach » thu sach, su sach, te sach
ty tang » tay tang, ty xang, ty hang
tang ma » mang may, tang van
sach ty » sach y, sach tu, sach thu
cua te » cua tu
loc va » hoc va, luc va
soc va » hoc va, doc va, goc va
ma hoi » mai hoi, xa hoi, ma hoa

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 tang ma hoi. hieu qua cham ((soc va) or (loc va)) thanh lai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty tang ma hoi. hieu qua cham ((soc va) OR (loc va)) thanh lai ((dua tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty tang ma hoi. hieu qua cham ((soc va) or (loc va)) thanh lai ((dua tren) or (cua te))*.