Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cac quoc » cac nuoc, cac cuoc, cao quoc
hanh tai » thanh tai, hang tai, han tai
ban hanh » ban hang
quoc ban » quoc bao, quoc lan, quoc quan
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu va, hieu van
tai cua » thai cua, tai cuc, tri cua
te sach » toc sach
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 sach) or (vu bach)) ky ((nang xa) OR (nang x)) hoi. hieu ve cac quoc ban hanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (vu bach)) ky ((nang xa) OR (nang x)) hoi. hieu ve cac quoc ban hanh tai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (vu bach)) ky ((nang xa) OR (nang x)) hoi. hieu ve cac quoc ban hanh tai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (vu bach)) ky ((nang xa) OR (nang x)) hoi. hieu ve cac quoc ban hanh tai cua triet*.