Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
va dau » va dao
tu van » tu va

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 ty nang xa hoi. lieu va dau tu van hanh dai ((cua triet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. lieu va dau tu van hanh dai ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. lieu va dau tu van hanh dai ((cua triet) OR (su triet))*.