Perhaps you should try some spelling variations:
ve triet » va trien, su triet
sach ky » sac ky, sach ty, sach kem
hanh ki » hanh vi, hanh ky, hanh kien
va hanh » van hanh, va thanh, va danh
cao tuc » dao tuc, cao duc, cao suc
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
va cao » va cac, va co, va dao
tuc va » thuc va, truc va, tuc xa
ki ve » ke ve, gi ve, vi ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) or (sach y)) ((nang xa) OR (lang xa)) hoi. lieu va cao tuc va hanh ki ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) ((nang xa) OR (lang xa)) hoi. lieu va cao tuc va hanh ki ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sach y)) ((nang xa) OR (lang xa)) hoi. lieu va cao tuc va hanh ki ve triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach y)) ((nang xa) OR (lang xa)) hoi. lieu va cao tuc va hanh ki ve triet*.