Perhaps you should try some spelling variations:
te sach » toc sach
qua cam » qua cham, qua cac, qua ca
cam tuc » cam xuc, cam tu, nam thuc
tuc van » thuc van, truc van, tuc va
van anh » van thanh, tuan anh, van minh
y lang » o lang, tay lang, yen lang
_ lang » o lang, _ land
vi cau » ve cau, di cau, viet cau
va cau » van cau, va cac, va dau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y lang) OR (_ lang)) xa hoi. hieu qua cam tuc van anh ((vi cau) OR (va cau)) treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y lang) or (_ lang)) xa hoi. hieu qua cam tuc van anh ((vi cau) OR (va cau)) treo~".
• Adding a wildcard symbol may retrieve word variants: te sach ((y lang) or (_ lang)) xa hoi. hieu qua cam tuc van anh ((vi cau) OR (va cau)) treo*.