Perhaps you should try some spelling variations:
dang mai » dang hai, dang mau, dang bai
cuc ban » cua ban, cac ban, duc ban
ky dang » ky nang, ky danh
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » hieu qua
cuu ban » cuu van, cua ban, cuu san
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
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 sac ky dang mai hoi. ((hieu va) or (lieu va)) chat ((cuc ban) OR (cuu ban)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang mai hoi. ((hieu va) OR (lieu va)) chat ((cuc ban) OR (cuu ban)) hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky dang mai hoi. ((hieu va) or (lieu va)) chat ((cuc ban) OR (cuu ban)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang mai hoi. ((hieu va) or (lieu va)) chat ((cuc ban) OR (cuu ban)) hanh vi cua te*.