Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va
cham tu » pham tu, cam tu, chai tu
va dinh » van dinh, va kinh, va tinh
dinh va » dinh van, dinh ve, tinh va
te sac » te sach, te cac, te san
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: te sac ky nang xa hoi. ((hieu ve) or (((hieu va) OR (hieu qua)))) cham tu va dinh va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang xa hoi. ((hieu ve) OR (((hieu va) OR (hieu qua)))) cham tu va dinh va su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang xa hoi. ((hieu ve) or (((hieu va) OR (hieu qua)))) cham tu va dinh va su triet".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. ((hieu ve) or (((hieu va) OR (hieu qua)))) cham tu va dinh va su triet*.