Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
van tham » van thanh, van tuan, van chat
lang van » dang van, tang van, hoang van
van cham » van chat, va cham, van pham
va hanh » van hanh, va thanh, va danh
te sach » toc sach
lang xa » lang ha, dang xay
cua tre » cua te, cuu tre, cua triet
soc va » hoc va, loc va, doc va
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: te sach thu ((lang xa) OR (lang van)) hoi. hieu ((van cham) or (van tham)) soc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu ((lang xa) OR (lang van)) hoi. hieu ((van cham) OR (van tham)) soc va hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thu ((lang xa) OR (lang van)) hoi. hieu ((van cham) or (van tham)) soc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach thu ((lang xa) OR (lang van)) hoi. hieu ((van cham) or (van tham)) soc va hanh vi cua tre*.