Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
te sach » toc sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va
hanh di » hanh vi, hanh de, hang di
tu van » tu va
di cua » dai cua, doi cua, de cua
cam tu » cam thu, nam tu, dam tu
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: ((te sach) or (thuoc sach)) y lang xa hoi. ((hieu ve) OR (hieu van)) cam tu van hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuoc sach)) y lang xa hoi. ((hieu ve) OR (hieu van)) cam tu van hanh di cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thuoc sach)) y lang xa hoi. ((hieu ve) OR (hieu van)) cam tu van hanh di cua te*".