Perhaps you should try some spelling variations:
ban manh » ban hanh, van manh, ban anh
dua tren » dung tren
danh xay » dang xay, manh xay, anh xay
ban mach » ban sach, ranh mach, ban hanh
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
xay hoi » xa hoi, tay hoi, cay phoi
ky danh » ky anh, ky dang
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam

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 danh xay hoi. hieu ve cam xuc ((ban manh) OR (ban mach)) hai ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky danh xay hoi. hieu ve cam xuc ((ban manh) OR (ban mach)) hai ((dua tren) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky danh xay hoi. hieu ve cam xuc ((ban manh) OR (ban mach)) hai ((dua tren) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky danh xay hoi. hieu ve cam xuc ((ban manh) OR (ban mach)) hai ((dua tren) or (cuu tre))*.