Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
dang mai » dang hai, dang mau, dang bai
cam luc » cam xuc, cau luc
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
ky dang » ky nang, ky danh
vu sach » vu bach, su sach, vu khach
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
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 (vu sach)) ky dang mai hoi. hieu va cam luc ((van hanh) or (ban hanh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (vu sach)) ky dang mai hoi. hieu va cam luc ((van hanh) OR (ban hanh)) vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu sach)) ky dang mai hoi. hieu va cam luc ((van hanh) or (ban hanh)) vi cua triet*.