Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
toc sach » hoc sach, doc sach, nuoc sach
hieu van » thien van, lieu va, hieu ve
tuc van » thuc van, truc van, tuc va
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
van anh » van thanh, tuan anh, van minh
cam tuc » cam xuc, cam tu, nam thuc
va cua » va chua, via cua, ca cua
anh va » hanh va
y lang » o lang, _ lang, tay lang
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) OR (thuoc sach)) y lang xa hoi. ((hieu va) or (hieu van)) cam tuc van anh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuoc sach)) y lang xa hoi. ((hieu va) OR (hieu van)) cam tuc van anh va cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (thuoc sach)) y lang xa hoi. ((hieu va) or (hieu van)) cam tuc van anh va cua te".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (thuoc sach)) y lang xa hoi. ((hieu va) or (hieu van)) cam tuc van anh va cua te*.