Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
hieu ve » hieu va, hieu van
y lang » o lang, tay lang, yen lang
_ lang » o lang, _ land
ve cam » ve cham, ve cac, va cam
cam tu » cam thu, nam tu, dam tu
tu van » tu va
vi cua » vai cua, di cua
cua te » cua tu

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) OR (thuoc sach)) ((y lang) OR (_ lang)) xa hoi. hieu ve cam tu van hanh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thuoc sach)) ((y lang) OR (_ lang)) xa hoi. hieu ve cam tu van hanh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuoc sach)) ((y lang) OR (_ lang)) xa hoi. hieu ve cam tu van hanh vi cua te*.