Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
luoc van » luoc can, luoc va, luot van
luc van » luu van, duc van, luc va
tu cham » toc cham, thi cham
hieu tu » chieu tu, hieu tuc, hien tu
lang xa » dang xay, lang van
lang ha » long ha
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y ((lang xa) OR (lang ha)) hoi. hieu tu cham ((luc van) or (luoc van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((lang xa) OR (lang ha)) hoi. hieu tu cham ((luc van) OR (luoc van)) hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((lang xa) OR (lang ha)) hoi. hieu tu cham ((luc van) or (luoc van)) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach y ((lang xa) OR (lang ha)) hoi. hieu tu cham ((luc van) or (luoc van)) hanh vi cua tre*.