Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
can thuc » dan thuc, cay thuc, san thuc
van thuc » va thuc, dan thuc, van thu
thanh vi » thanh va, thanh ve, nhanh vi
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky dang xa hoi. hieu va ((can thuc) OR (van thuc)) va ((thanh vi) or (hanh vi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky dang xa hoi. hieu va ((can thuc) OR (van thuc)) va ((thanh vi) OR (hanh vi)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky dang xa hoi. hieu va ((can thuc) OR (van thuc)) va ((thanh vi) or (hanh vi)) cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach ky dang xa hoi. hieu va ((can thuc) OR (van thuc)) va ((thanh vi) or (hanh vi)) cua triet*.