Perhaps you should try some spelling variations:
ban hanh » ban hang
thu sach » thuat sach, thuoc sach, thu hoach
dang mai » dang hai, dang mau, dang bai
tu sach » su sach, te sach, tu cach
xuc ban » duc ban, cuc ban, quoc ban
va chat » van chat, va phat, hoa chat
mai hoi » mai khoi, dai hoi, lai hoi
ky dang » ky nang, ky danh
vi cua » vai cua, di cua
cua te » cua tu

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 dang mai hoi. hieu ((va chat) or (cao chat)) xuc ban hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky dang mai hoi. hieu ((va chat) OR (cao chat)) xuc ban hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky dang mai hoi. hieu ((va chat) or (cao chat)) xuc ban hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky dang mai hoi. hieu ((va chat) or (cao chat)) xuc ban hanh vi cua te*.