Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
cac thu » cach thuc, cac thoi
tu sac » tu sach, tu cac, tu san
cac tu » cach tu, cac du, tac tu
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky dang xa hoi. hieu vien ((cac tu) or (cac thu)) van hanh vai ((va triet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang xa hoi. hieu vien ((cac tu) OR (cac thu)) van hanh vai ((va triet) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang xa hoi. hieu vien ((cac tu) or (cac thu)) van hanh vai ((va triet) or (hoa viet))*.