Perhaps you should try some spelling variations:
thien van » thi van
thanh tai » thanh hai, thanh toan, doanh tai
hieu van » hieu va, lieu va, hieu ve
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
duc ban » duc van, dua ban, duc man
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo
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) or (thien van)) lam ((duc ban) or (duc tan)) thanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. ((hieu van) OR (thien van)) lam ((duc ban) OR (duc tan)) thanh tai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. ((hieu van) or (thien van)) lam ((duc ban) or (duc tan)) thanh tai cuu tre*.