Perhaps you should try some spelling variations:
nang chon » nang cho, nang hoc, sang cho
van hanh » van thanh, ban hanh, van anh
ve cach » ve canh
hanh di » hanh vi, hanh de, hang di
vuc van » duc van, luc van, thuc van
cac vuc » cac nuoc, cac vung, cac cuoc
hieu ve » hieu va, hieu van
va cach » va cac
cua cau » cua cac, cua chu, cua cay
ve cac » va cac, vien cac
di cua » dai cua, doi cua, de 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 chon) or (nang cao)) hoc. hieu ve cac vuc van hanh di cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ve cach) OR (va cach)) tu ((nang chon) OR (nang cao)) hoc. hieu ve cac vuc van hanh di cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ve cach) OR (va cach)) tu ((nang chon) or (nang cao)) hoc. hieu ve cac vuc van hanh di cua cau*".