Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
hoc sach » hoc sinh, hoc cac, hoc anh
van hanh » ban hanh, van anh, van ban
cua lao » cu lao, ca lao, cua dao
toc sac » toc sach, toc san, doc sach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
vi cua » vai cua, di cua
ve cua » le cua, de cua, te cua

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 (hoc sach)) ky nang xa hoi. hieu ve cua lao ((van hanh) OR (van thanh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sac) OR (hoc sach)) ky nang xa hoi. hieu ve cua lao ((van hanh) OR (van thanh)) vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sac) or (hoc sach)) ky nang xa hoi. hieu ve cua lao ((van hanh) OR (van thanh)) vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((toc sac) or (hoc sach)) ky nang xa hoi. hieu ve cua lao ((van hanh) OR (van thanh)) vi cua triet*.