Perhaps you should try some spelling variations:
hieu phan » phieu phan, lieu phan, hieu pham
phan dat » phan dau, phan dai, phan day
dat luan » dan luan, dau luan, dat quang
thu san » thuy san, thu ban, phu san
nang xa » nang x, lang xa, nang ma
luan va » luan van, luat va
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
san ky » sang ky, van ky, dan ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu san ky nang xa hoi. hieu phan dat luan va hanh vi ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu san ky nang xa hoi. hieu phan dat luan va hanh vi ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thu san ky nang xa hoi. hieu phan dat luan va hanh vi ((cua tre) OR (cuu tre))*.