Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
van cham » van chat, van tham, va cham
thu lang » thu hang, thu bang, tho lang
phu lang » phap lang, phu khang, phu luong
va hanh » van hanh, va thanh, va danh
te sach » toc sach
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) OR (phu lang)) xa hoi. hieu ((van cham) or (van thanh)) soc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thu lang) OR (phu lang)) xa hoi. hieu ((van cham) OR (van thanh)) soc va hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((thu lang) OR (phu lang)) xa hoi. hieu ((van cham) or (van thanh)) soc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((thu lang) OR (phu lang)) xa hoi. hieu ((van cham) or (van thanh)) soc va hanh vi cua tre*.