Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh vi » hanh vi, dinh vi, danh di
ve danh » ve canh, le danh, va danh
hai chu » hai chau, hoi chu, hai chi
tu sach » thu sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
hai cuu » hai cua, hai cuc, thai cua
vi cua » vai cua, di cua

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) or (su sach)) ky nang xa hoi. hieu qua ((hai cuu) OR (hai chu)) ve danh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang xa hoi. hieu qua ((hai cuu) OR (hai chu)) ve danh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang xa hoi. hieu qua ((hai cuu) OR (hai chu)) ve danh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang xa hoi. hieu qua ((hai cuu) OR (hai chu)) ve danh vi cua triet*.