Perhaps you should try some spelling variations:
thien van » thi van
thanh hai » thanh phan, thanh hoa, thanh san
hieu van » hieu va, lieu va, hieu ve
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
va thanh » gia thanh, ban thanh, va tinh
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
hai cua » thai cua, dai cua, hoi cua
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: so sach y nang xa hoi. ((hieu van) OR (thien van)) ((cac nuoc) or (cam xuc)) va thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang xa hoi. ((hieu van) OR (thien van)) ((cac nuoc) OR (cam xuc)) va thanh hai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang xa hoi. ((hieu van) OR (thien van)) ((cac nuoc) or (cam xuc)) va thanh hai cua tre*".