Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
danh xay » dang xay, manh xay, anh xay
dua tren » dung tren
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
xuc ban » duc ban, cuc ban, quoc ban
ban anh » ban hanh, ban banh, ban danh
anh hoc » sinh hoc, benh hoc, hinh hoc
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: thu sach ky ((danh xay) or (van xay)) hoi. hieu ve cam xuc ban anh hoc ((dua tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((danh xay) OR (van xay)) hoi. hieu ve cam xuc ban anh hoc ((dua tren) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((danh xay) or (van xay)) hoi. hieu ve cam xuc ban anh hoc ((dua tren) or (cua triet))*.