Perhaps you should try some spelling variations:
thanh tien » thanh vien, thanh nien, thang tien
hieu van » hieu va, thien van, lieu va
tien cua » trien cua, tiep cua, dien cua
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
van cam » van nam, van lam, van cau
thuc va » thuc dan, thuc day
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 _ lang xa hoi. hieu van cam ((xuc va) or (((thuc va) OR (thuc vat)))) thanh tien cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach _ lang xa hoi. hieu van cam ((xuc va) OR (((thuc va) OR (thuc vat)))) thanh tien cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach _ lang xa hoi. hieu van cam ((xuc va) or (((thuc va) OR (thuc vat)))) thanh tien cua tre*".