Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hoc sach » hoc sinh, hoc cac, hoc anh
toc sac » toc sach, toc san, doc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cua lao » cu lao, ca lao, cua dao
va hanh » van hanh, va thanh, va danh
ve cua » le cua, de cua, te cua
lao va » tao va, cao va, bao va
vi cua » vai cua, di 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 va hanh 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 va hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((toc sac) OR (hoc sach)) ky nang xa hoi. hieu ve cua lao va hanh vi cua triet*.