Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hieu vien » hieu viec, thieu nien, hieu tieng
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
va triet » va thiet, va trien, ve triet
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, lang xa, nang ma
cac lop » cac hop, cac loai
su cac » tu cac, su cao, su can
lop va » lap va, hop va, nop va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cac ky nang xa hoi. ((hieu vien) OR (hieu hien)) cac lop va thanh vi ((va triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky nang xa hoi. ((hieu vien) OR (hieu hien)) cac lop va thanh vi ((va triet) OR (cua viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky nang xa hoi. ((hieu vien) OR (hieu hien)) cac lop va thanh vi ((va triet) or (cua viet))*".