Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cac quoc » cac nuoc, cac cuoc, cao quoc
quoc ban » quoc bao, quoc lan, quoc quan
than tai » thanh tai, toan tai, nhan tai
nang co » nang cao, nang doc, nang noi
hieu ve » hieu va, hieu van
han tai » hang tai, nhan tai, van tai
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
co hoi » co hoc, co loi
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: te sac ky nang co hoi. hieu ve cac quoc ban ((han tai) or (than tai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang co hoi. hieu ve cac quoc ban ((han tai) OR (than tai)) cua triet.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang co hoi. hieu ve cac quoc ban ((han tai) or (than tai)) cua triet*.