Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
hanh dai » hanh tai, hanh dao, vanh dai
sach tu » sach thu, cach tu, sach uu
va hanh » van hanh, va thanh, va danh
cao tuc » dao tuc, cao duc, cao suc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach thu, xach tay
tuc va » thuc va, truc va, tuc xa
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) OR (sach ty)) nang xa hoi. hieu va cao tuc va hanh dai ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach tu) OR (sach ty)) nang xa hoi. hieu va cao tuc va hanh dai ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach tu) OR (sach ty)) nang xa hoi. hieu va cao tuc va hanh dai ((cua triet) or (va triet))".
• Adding a wildcard symbol may retrieve word variants: te ((sach tu) OR (sach ty)) nang xa hoi. hieu va cao tuc va hanh dai ((cua triet) or (va triet))*.