Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dung doi » huong doi, dung tai, dung co
danh doi » danh di, thanh doi, danh hoa
cac tuc » cac toc, cac tu, cac tac
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
dai hoi » dai hoc, dai hai, dai moi
mai hoi » mai khoi, lai hoi, mai doi
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty nang ((mai hoi) or (dai hoi)). hieu ve cac tuc xa ((danh doi) or (dung doi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang ((mai hoi) OR (dai hoi)). hieu ve cac tuc xa ((danh doi) OR (dung doi)) cua triet.
• Adding a wildcard symbol may retrieve word variants: so sach ty nang ((mai hoi) or (dai hoi)). hieu ve cac tuc xa ((danh doi) or (dung doi)) cua triet*.