Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
danh xay » manh xay, anh xay, dan xay
van cac » van hac, van cau, van bac
cac xuc » cam xuc, cac nuoc, chat xuc
xuc ban » duc ban, cuc ban, quoc ban
ban anh » ban hanh, ban banh, ban danh
anh hoc » sinh hoc, benh hoc, hinh hoc
cua tre » cua te, cuu tre, dua tren
thu sai » thu hai, thu tai, thu san
sai ky » sac ky

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sai ky ((danh xay) or (dang xay)) hoi. hieu van cac xuc ban anh hoc ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sai ky ((danh xay) OR (dang xay)) hoi. hieu van cac xuc ban anh hoc ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: thu sai ky ((danh xay) or (dang xay)) hoi. hieu van cac xuc ban anh hoc ((cua tre) or (cua triet))*.