Perhaps you should try some spelling variations:
thanh pham » thanh phan, thanh pho, thanh hai
thanh nam » hanh nam, thanh tam, thanh nhan
su triet » su viet, su tien, ve triet
cau duc » cao duc, cau luc, chu duc
tu sach » thu sach, te sach, tu cach
nang co » nang cao, nang doc, nang noi
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
va cau » van cau, va cac, va dau
co hoi » co hoc, co loi

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