Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach ky » sac ky, sach y, sach ty
hang vi » hang va, hanh vi, khang voi
hang di » hang doi, hang dien, hang dich
co sach » bo sach, cuon sach, hoc sach
cac tac » cac toc, cac dac, cac tai
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cac bac » cac bai, cac ban, cac cach

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ky nang xa hoi. hieu ve ((cac tac) OR (cac bac)) vang ((hang di) or (hang vi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ky nang xa hoi. hieu ve ((cac tac) OR (cac bac)) vang ((hang di) OR (hang vi)) cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ky nang xa hoi. hieu ve ((cac tac) OR (cac bac)) vang ((hang di) or (hang vi)) cua triet*".