Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
so sanh » do sanh
cao hoi » cau hoi, co hoi, cao hoc
va hanh » van hanh, va danh, ban hanh
he nam » ha nam, nghe nam
sanh y » sinh y, anh y, hanh y
ve nam » va nam, le nam, te nam
y nang » ky nang, ly nang, v nang
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 nam) OR (he nam)) thuc ((va hanh) or (va thanh)) vi hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh y nang cao hoi. hieu ((ve nam) OR (he nam)) thuc ((va hanh) OR (va thanh)) vi hoa viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh y nang cao hoi. hieu ((ve nam) OR (he nam)) thuc ((va hanh) or (va thanh)) vi hoa viet".
• Adding a wildcard symbol may retrieve word variants: so sanh y nang cao hoi. hieu ((ve nam) OR (he nam)) thuc ((va hanh) or (va thanh)) vi hoa viet*.