Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dao » lanh dao, thanh dat, thanh dam
dao cua » dai cua, day cua, dan cua
cac van » cac dan
soc van » hoc van, oc van, sac van
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sang ky » sang kyo, dang ky, tang ky
san ky » van ky, dan ky, ban ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((san ky) OR (sang ky)) nang xa hoi. hieu va chat ((soc van) or (cac van)) hanh dao cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((san ky) OR (sang ky)) nang xa hoi. hieu va chat ((soc van) OR (cac van)) hanh dao cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((san ky) OR (sang ky)) nang xa hoi. hieu va chat ((soc van) or (cac van)) hanh dao cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((san ky) OR (sang ky)) nang xa hoi. hieu va chat ((soc van) or (cac van)) hanh dao cua triet*.