Perhaps you should try some spelling variations:
kho lang » kho tang, cho lang, khoai lang
ban hanh » ban hang
tho lang » thon lang, cho lang, tho nang
hieu van » hieu va, thien van, lieu va
cuu tre » cua tre, cau tren, cau treo
cao suc » cao su, cao duc
hieu ve » hieu va
suc ban » suc ben, duc ban, cuc ban
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 lang) OR (tho lang)) xa hoi. ((hieu ve) or (hieu van)) cao suc ban hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ((kho lang) OR (tho lang)) xa hoi. ((hieu ve) OR (hieu van)) cao suc ban hanh vi cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ((kho lang) OR (tho lang)) xa hoi. ((hieu ve) or (hieu van)) cao suc ban hanh vi cuu tre*".