Perhaps you should try some spelling variations:
nhan viec » nhan vien, nhan viet, nha viec
cua triet » cua viet, su triet, va triet
thu sang » thu hang, thu san, thu bang
ky tang » ky dang, kho tang, ky trong
hieu ve » hieu va, hieu van
ve kham » vu kham, va kham, ve cham
soc van » hoc van, sac van, soc dan
ma noi » ha noi, ma moi, va noi
oc van » hoc van, luoc van, quoc van

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sang ((ky tang) OR (ky nang)) ma noi. hieu ve kham ((soc van) or (oc van)) nhan viec cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sang ((ky tang) OR (ky nang)) ma noi. hieu ve kham ((soc van) OR (oc van)) nhan viec cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sang ((ky tang) OR (ky nang)) ma noi. hieu ve kham ((soc van) or (oc van)) nhan viec cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sang ((ky tang) OR (ky nang)) ma noi. hieu ve kham ((soc van) or (oc van)) nhan viec cua triet*.