Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
loc van » luoc van, hoc van, lo van
cac loc » cac lop, cac toc, cac hoc
van cac » van hac, van cau, van bac
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
phu san » phi san, thuy san
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu san) OR (phu san)) ky lang xa hoi. hieu van cac loc van hanh vi ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu san) OR (phu san)) ky lang xa hoi. hieu van cac loc van hanh vi ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((tu san) OR (phu san)) ky lang xa hoi. hieu van cac loc van hanh vi ((cua tre) OR (cuu tre))*.