Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
va triet » va thiet, va trien, ve triet
thu sach » thuat sach, thuoc sach, thu hoach
tan hanh » tan thanh, tang hanh, toan hanh
thai va » thai van
tu sach » su sach, te sach, tu cach
va cao » va cac, va co, va dao
ve cao » ve bao, ve cac, ve co
x hoi » xa hoi, o hoi, x ho

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 (thu sach)) ky nang x hoi. hieu ((ve cao) OR (va cao)) duc tan hanh thai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang x hoi. hieu ((ve cao) OR (va cao)) duc tan hanh thai va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky nang x hoi. hieu ((ve cao) OR (va cao)) duc tan hanh thai va triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang x hoi. hieu ((ve cao) OR (va cao)) duc tan hanh thai va triet*.