Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
kho tang » cao tang
cuu tre » cua tre, cau tren, cau treo
dua ban » dia ban, cua ban, qua ban
duc ban » duc tan, duc van, duc man
san kho » san khoa, san cho, lan kho
hieu ve » hieu va
tang xa » trang xa, tang ma, lang xa
vi cuu » vi luu, vinh cuu
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 kho tang xa hoi. ((hieu ve) or (hieu van)) cao ((duc ban) OR (dua ban)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san kho tang xa hoi. ((hieu ve) OR (hieu van)) cao ((duc ban) OR (dua ban)) hanh vi cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san kho tang xa hoi. ((hieu ve) or (hieu van)) cao ((duc ban) OR (dua ban)) hanh vi cuu tre*".