Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
hoc sach » hoc sinh, hoc cac, hoc anh
hieu cua » hieu qua, dieu cua, bieu cua
sach ty » sach y, sach tu, sach thu
ca viet » va viet, co viet, hoa viet
ty ang » ty xang, ty hang, ty anh
ang xa » lang xa, mang xa, dang xay
ly van » le van, ly von, lo van
tai ca » tai cac, tai cao, tai cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ty ang xa hoi. hieu cua cac ((ly va) or (ly van)) thanh tai ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ty ang xa hoi. hieu cua cac ((ly va) OR (ly van)) thanh tai ca viet.
• Adding a wildcard symbol may retrieve word variants: hoc sach ty ang xa hoi. hieu cua cac ((ly va) or (ly van)) thanh tai ca viet*.