Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cau treo » cau theo, cau tren, cau triet
dua tren » dung tren
hieu van » hieu va, thien van, lieu va
bao duc » dao duc, bao luc, cao duc
duc van » duc va, duc tan, duc manh
tu sach » thu sach, su sach, tu cach
te sach » toc sach
van bao » van ban, van dao
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) y nang x hoi. hieu van bao duc van thanh san ((dua tren) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang x hoi. hieu van bao duc van thanh san ((dua tren) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) y nang x hoi. hieu van bao duc van thanh san ((dua tren) or (cau treo))*.