Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
vat hanh » vat thanh, va hanh, nhat hanh
van hanh » van thanh, ban hanh, van anh
so sanh » do sanh
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
sanh y » sinh y, anh y, hanh y
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
vi hoa » voi hoa, vi hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh y nang cao hoi. hieu ve cac thuc ((vat hanh) or (van hanh)) vi hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh y nang cao hoi. hieu ve cac thuc ((vat hanh) OR (van hanh)) vi hoa viet.
• Adding a wildcard symbol may retrieve word variants: so sanh y nang cao hoi. hieu ve cac thuc ((vat hanh) or (van hanh)) vi hoa viet*.