Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thien van » thi van
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
dau xuc » dau xac, dau nuoc
dau xua » dau cua, dao xuan, dau luan
tu nang » tru nang, tu nong, tu nano
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: su sach ((tu nang) or (truc nano)) xa hoi. thien van ((dau xuc) OR (dau xua)) van thanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((tu nang) OR (truc nano)) xa hoi. thien van ((dau xuc) OR (dau xua)) van thanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((tu nang) or (truc nano)) xa hoi. thien van ((dau xuc) OR (dau xua)) van thanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((tu nang) or (truc nano)) xa hoi. thien van ((dau xuc) OR (dau xua)) van thanh vi cuu tre*.