Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
thu sach » tu sach, thuat sach, thuoc sach
dua tren » dung tren
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam

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 lang xa hoi. hieu ve cam ((truc va) or (tuc xa)) thanh lai ((cua tre) or (dua tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty lang xa hoi. hieu ve cam ((truc va) OR (tuc xa)) thanh lai ((cua tre) OR (dua tren)).
• Adding a wildcard symbol may retrieve word variants: thu sach ty lang xa hoi. hieu ve cam ((truc va) or (tuc xa)) thanh lai ((cua tre) or (dua tren))*.