Perhaps you should try some spelling variations:
cac vung » cac ung, cac chung, cach dung
nang cho » nang chon, ngang cho, nang cao
van hanh » van thanh, ban hanh, van ban
hoc cac » hoc cao
van anh » van thanh, tuan anh, van minh
cua cau » cua cac, cua chu, cua cay
cac vuc » cac nuoc, cac cuoc, cac quoc
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
ty nang » ky nang, ty xang, ty hang
cac ty » cac ky, cac tu
vi cua » vai cua, di cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc cac ty nang cho hoc. hieu ve ((cac vuc) OR (cac vung)) ((van hanh) OR (van anh)) vi cua cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc cac ty nang cho hoc. hieu ve ((cac vuc) OR (cac vung)) ((van hanh) or (van anh)) vi cua cau~".
• Adding a wildcard symbol may retrieve word variants: hoc cac ty nang cho hoc. hieu ve ((cac vuc) OR (cac vung)) ((van hanh) or (van anh)) vi cua cau*.