Perhaps you should try some spelling variations:
ban hanh » ban hang
dang mai » dang mau, dang bai, dang mam
chat huu » pham huu
dang hai » dang khai, hang hai, dung hai
chat xuc » cam xuc, chao xu, chat cua
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
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 ky ((dang mai) or (dang hai)) hoi. hieu va ((chat xuc) OR (chat huu)) ban hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((dang mai) OR (dang hai)) hoi. hieu va ((chat xuc) OR (chat huu)) ban hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((dang mai) or (dang hai)) hoi. hieu va ((chat xuc) OR (chat huu)) ban hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((dang mai) or (dang hai)) hoi. hieu va ((chat xuc) OR (chat huu)) ban hanh vi cua te*.