Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
toc sac » toc sach, toc san, hoc sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
van cua » vang cua, ban cua, dan cua
cua lao » cu lao, ca lao, cua dao
va hanh » van hanh, va thanh, va danh
sac ky » cac ky, sai ky
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 ky ((nang xa) OR (lang xa)) hoi. hieu van cua lao va hanh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky ((nang xa) OR (lang xa)) hoi. hieu van cua lao va hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sac ky ((nang xa) OR (lang xa)) hoi. hieu van cua lao va hanh vi cua triet*.