Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dang xay » dang van, van xay
hieu van » thien van, lieu va, hieu ve
cam tuc » cam xuc, cam tu, nam thuc
lang xa » lang ha, lang van
hieu va » lieu va, hieu qua
van anh » van thanh, tuan anh, van minh
tuc van » thuc van, truc van, tuc va
vi cua » vai cua, di cua
anh vi » hanh vi, anh va, anh ve
cua te » cua tu

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

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