Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thu sach » tu sach, thuat sach, thuoc sach
thanh va » thanh van, hanh va, thanh ha
hieu van » hieu va, thien van, lieu va
cau tren » cu tren, dau tren, ca tren
tru nang » tra nang, tri nang, truc nano
xuc van » duc van, luc van, vuc van
tu nang » tu nong, tu nano, tu lang
cuu tre » cua tre, cau treo
nam xuc » cam xuc, nam xua, nam thuc

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

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