Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
hang doi » hang di, hang loi, huong doi
hieu ve » hieu va, hieu van
doi cua » dai cua, hoi cua
va hang » van hang, va nang, va lang
cua lao » cu lao, ca lao, cua dao
toc sac » toc san, hoc sach, doc sach
hieu le » hieu he, hieu ly, tieu le
nang xa » nang x, lang xa, nang ma
lao va » tao va, cao va, bao va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sac) OR (toc sach)) ky nang xa hoi. ((hieu le) or (hieu ve)) cua lao va hang doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sac) OR (toc sach)) ky nang xa hoi. ((hieu le) OR (hieu ve)) cua lao va hang doi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sac) OR (toc sach)) ky nang xa hoi. ((hieu le) or (hieu ve)) cua lao va hang doi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((toc sac) OR (toc sach)) ky nang xa hoi. ((hieu le) or (hieu ve)) cua lao va hang doi cua triet*.