Perhaps you should try some spelling variations:
doanh cao » doanh co, doanh bao, doanh cho
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van chat » cao chat
danh dau » lanh dao, hang dau, danh tu
nang xa » nang x, lang xa, nang ma
tu sac » tu sach, tu cac, tu san
doc va » duoc va, hoc va, duc va
sac ky » cac ky, sai ky
soc va » hoc va, loc va, goc va

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 nang xa hoi. hieu van chat ((soc va) or (doc va)) ((danh dau) or (doanh cao)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. hieu van chat ((soc va) OR (doc va)) ((danh dau) OR (doanh cao)) cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. hieu van chat ((soc va) or (doc va)) ((danh dau) or (doanh cao)) cua triet*.