Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
lai cua » dai cua, hai cua, lai chau
thuc va » thuc vat, thuc dan, thuc day
sach ty » sach y, sach tu, sach thu
tang ma » mang may, tang van
hieu ve » hieu va
ty tang » tay tang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
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 ty tang ma hoa. ((hieu ve) OR (hieu van)) cam ((xuc va) or (thuc va)) thanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty tang ma hoa. ((hieu ve) OR (hieu van)) cam ((xuc va) OR (thuc va)) thanh lai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty tang ma hoa. ((hieu ve) OR (hieu van)) cam ((xuc va) or (thuc va)) thanh lai cua tre*".