Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
vu sach » vu bach, su sach, vu khach
tu dang » thu dang, su dang, vu dang
van cau » van dau, van hau, van chat
van lam » van nam
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((tu dang) OR (tu dong)) xa hoi. hieu ((van cau) or (van lam)) duc va thanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((tu dang) OR (tu dong)) xa hoi. hieu ((van cau) OR (van lam)) duc va thanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((tu dang) OR (tu dong)) xa hoi. hieu ((van cau) or (van lam)) duc va thanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ((tu dang) OR (tu dong)) xa hoi. hieu ((van cau) or (van lam)) duc va thanh vi cuu tre*.