Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh doi » danh di, thanh doi, dung doi
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
xa danh » va danh, dia danh, nam danh
cua tre » cua te, cuu tre, dua tren
ma hoi » mai hoi, ma hoa, me hoi
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: vu sach ky nang ((ma hoi) OR (xa hoi)). hieu ve cac tuc xa danh doi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang ((ma hoi) OR (xa hoi)). hieu ve cac tuc xa danh doi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang ((ma hoi) OR (xa hoi)). hieu ve cac tuc xa danh doi ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang ((ma hoi) OR (xa hoi)). hieu ve cac tuc xa danh doi ((cua tre) or (cua triet))*.