Perhaps you should try some spelling variations:
sach tay » xach tay, sach hay, sach nay
tay tang » tay lang, tay trung, tay quang
hieu van » thien van, hieu ve
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
hieu va » hieu qua
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 va) OR (((hieu van) OR (lieu va)))) cam truc van hanh vi cua tuc~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tay tang xa hoi. ((hieu va) or (((hieu van) OR (lieu va)))) cam truc van hanh vi cua tuc~".
• Adding a wildcard symbol may retrieve word variants: te sach tay tang xa hoi. ((hieu va) or (((hieu van) OR (lieu va)))) cam truc van hanh vi cua tuc*.