Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
toc sach » hoc sach, doc sach, thuoc sach
sach thu » sach thue, sach thieu, sach tham
thu lang » thu hang, thu bang, phu lang
hieu van » hieu va, thien van, lieu va
thuc day » thuc vat
thuc dan » thuc hanh, hoc dan, thuc vat
cau tren » cu tren, dau tren, ca tren
lang xa » lang ha, dang xay, lang van
van cam » van nam, van lam, van cau
tai cau » tai cac, tai cao

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach thu lang xa hoi. hieu van cam ((thuc day) OR (thuc dan)) thanh tai cau tren~".
• Adding a wildcard symbol may retrieve word variants: toc sach thu lang xa hoi. hieu van cam ((thuc day) OR (thuc dan)) thanh tai cau tren*.