Perhaps you should try some spelling variations:
thien van » thi van
thanh tai » thanh hai, thanh toan, doanh tai
so sach » so sanh, bo sach, co sach
lang xa » lang ha, dang xay, lang van
van cam » van nam, van lam, van cau
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, tay lang
tuc va » thuc va, truc va, tuc xa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y lang xa hoi. thien van cam ((duc va) or (tuc va)) thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y lang xa hoi. thien van cam ((duc va) OR (tuc va)) thanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach y lang xa hoi. thien van cam ((duc va) or (tuc va)) thanh tai cua tre*.