Perhaps you should try some spelling variations:
ve triet » va trien, su triet
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
dinh va » dinh van, dinh ve, tinh va
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
du va » dau va, su va, vu va
va ve » va de, va le, va vi

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 va) or (lieu va)) cac ((du va) OR (tu va)) dinh va ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang xa hoi. ((hieu va) OR (lieu va)) cac ((du va) OR (tu va)) dinh va ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang xa hoi. ((hieu va) or (lieu va)) cac ((du va) OR (tu va)) dinh va ve triet".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. ((hieu va) or (lieu va)) cac ((du va) OR (tu va)) dinh va ve triet*.