Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
va thanh » ban thanh, va tinh, le thanh
nam thuc » nam thuoc, am thuc, nam thu
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
tai su » tai so, tai tu, lai su
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
nam tu » nam thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang xa hoi. hieu ve ((nam tu) OR (nam thuc)) ((va thanh) or (gia thanh)) tai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang xa hoi. hieu ve ((nam tu) OR (nam thuc)) ((va thanh) OR (gia thanh)) tai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang xa hoi. hieu ve ((nam tu) OR (nam thuc)) ((va thanh) or (gia thanh)) tai su triet".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. hieu ve ((nam tu) OR (nam thuc)) ((va thanh) or (gia thanh)) tai su triet*.