Perhaps you should try some spelling variations:
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
ve cach » ve cac, ve canh
vuc ban » vu ban, duc ban, cuc ban
cac vuc » cac nuoc, cac vung, cac cuoc
cua cau » cua cac, cua chu, cua cay
hieu ve » hieu va
nang co » nang cao, nang doc, nang noi
tu nang » tru nang, tu nong, tu nano
va cach » va cac
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ve cach) OR (va cach)) tu nang co hoc. ((hieu ve) or (hieu van)) cac vuc ban hanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ve cach) OR (va cach)) tu nang co hoc. ((hieu ve) OR (hieu van)) cac vuc ban hanh vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ve cach) OR (va cach)) tu nang co hoc. ((hieu ve) or (hieu van)) cac vuc ban hanh vi cua cau*".