Perhaps you should try some spelling variations:
thanh than » thanh thanh, thanh thang, thanh toan
ban thanh » ban hanh, ban hang
than cua » nhan cua, thai cua, ban cua
tu sach » thu sach, te sach, tu cach
cam duc » cam xuc, cao duc, nam duoc
cua tre » cua te, cuu tre, cua triet
hang xa » hoang xa, hang va, hang ca
tu hang » thu hang, tu hanh, tu hung
su sach » so sach, vu sach

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) tu hang xa hoi. lieu va ((cam duc) OR (pham duc)) ban thanh than cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) tu hang xa hoi. lieu va ((cam duc) or (pham duc)) ban thanh than cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) tu hang xa hoi. lieu va ((cam duc) or (pham duc)) ban thanh than cua tre*.