Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
sach tay » xach tay, sach hay, sach nay
tay tang » tay lang, tay trung, tay quang
cam truc » cau truc, nam truc, lam truoc
truc van » truc va, thuc van, truc ban
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
tang xa » trang xa, tang ma, lang xa
cua tuc » cua duc, cua tu, cua thuoc
vi cua » vai cua, di cua

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 tay tang xa hoi. ((hieu qua) OR (hieu quan)) cam truc van hanh vi cua tuc~.
• Adding a wildcard symbol may retrieve word variants: te sach tay tang xa hoi. ((hieu qua) or (hieu quan)) cam truc van hanh vi cua tuc*.