Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
danh da » danh dau, dan da, danh ca
sac ky » cac ky, sai ky
soc va » hoc va, doc va, goc va
loc va » hoc va, luc va
da su » dan su, dat su, va su

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) or (sach y)) nang xa hoi. hieu va chat ((soc va) OR (loc va)) danh da su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sach y)) nang xa hoi. hieu va chat ((soc va) OR (loc va)) danh da su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) or (sach y)) nang xa hoi. hieu va chat ((soc va) OR (loc va)) danh da su triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sach y)) nang xa hoi. hieu va chat ((soc va) OR (loc va)) danh da su triet*.