Perhaps you should try some spelling variations:
kho tang » cao tang
hieu van » hieu va, thien van, lieu va
can kho » can ho, can tho, can who
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va
duc van » duc va, duc manh, duc phan
cuu tre » cua tre, cau tren, cau treo
tu can » tu ban, tu cac, thu canh
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu can kho tang xa hoi. ((hieu ve) or (hieu van)) cam ((duc van) OR (duc tan)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can kho tang xa hoi. ((hieu ve) OR (hieu van)) cam ((duc van) OR (duc tan)) hanh vi cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu can kho tang xa hoi. ((hieu ve) or (hieu van)) cam ((duc van) OR (duc tan)) hanh vi cuu tre*".