Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
thanh van » thanh san, thanh toan, thanh nhan
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cam duc » cam xuc, cao duc, nam duoc
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. hieu van ((cam duc) or (pham duc)) ban ((thanh van) or (thanh phan)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu van ((cam duc) OR (pham duc)) ban ((thanh van) OR (thanh phan)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu van ((cam duc) or (pham duc)) ban ((thanh van) or (thanh phan)) cua tre*.