Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vi » thanh va, thanh ve, nhanh vi
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
ve bac » ve bao, ve ban, he bac
bo van » vo van, so van, do van
ve cac » va cac, vien cac

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

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