Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tay lang » tay tang, tay quang, tham lang
tai lang » tai cong, thi lan, tai san
cau treo » cau theo, cau tren, cau triet
hieu va » lieu va
thuc va » thuc vat, thuc dan, thuc day
dan vai » dan va, dan tai, dan vat
vai cau » va cau, van cau, vai cac
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((tay lang) or (tai lang)) xa hoi. ((hieu va) or (hieu qua)) am thuc va dan vai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((tay lang) OR (tai lang)) xa hoi. ((hieu va) OR (hieu qua)) am thuc va dan vai cau treo.
• Adding a wildcard symbol may retrieve word variants: toc sach ((tay lang) or (tai lang)) xa hoi. ((hieu va) or (hieu qua)) am thuc va dan vai cau treo*.