Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
toc sach » hoc sach, doc sach, thuoc sach
nang duc » nang luc, nang doc, nang du
kha nang » phap nang, ky nang, ki nang
hieu kha » lieu khoa, dieu khac, hien khoa
duc ban » duc tan, duc van, dua ban
tu sach » thu sach, su sach, te sach
nang ro » nang co, nang ho, nang ra
nang o » nang co, nang ho, nang x
vi cua » vai cua, di cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky ((nang o) OR (nang ro)) hai. hieu kha nang duc ban hanh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (toc sach)) ky ((nang o) OR (nang ro)) hai. hieu kha nang duc ban hanh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky ((nang o) OR (nang ro)) hai. hieu kha nang duc ban hanh vi cua triet*.