Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thanh ve » hanh ve, thanh va, thanh vien
cac treo » cac tro, cau treo, cac trieu
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
duc gia » quoc gia
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) ty lang xa hoi. hieu va pham duc gia thanh ve cac treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty lang xa hoi. hieu va pham duc gia thanh ve cac treo.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ty lang xa hoi. hieu va pham duc gia thanh ve cac treo*.