Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dai » hanh tai, hanh dao, thanh dat
vanh dai » van dai, vanh tai, lanh dao
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cao tuc » dao tuc, cao duc, cao suc
tuc van » thuc van, truc van, tuc va
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach tu nang xa hoi. hieu va cao tuc van ((hanh dai) OR (vanh dai)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu nang xa hoi. hieu va cao tuc van ((hanh dai) OR (vanh dai)) cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach tu nang xa hoi. hieu va cao tuc van ((hanh dai) OR (vanh dai)) cua triet*.