Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien sach » vien bach, dien sach, viet sach
sach luoc » sach duoc, sach nuoc, sach luan
va thanh » gia thanh, ban thanh, va tinh
mai hoi » mai khoi, dai hoi, lai hoi
luoc va » nuoc va, duoc va, loc va
vai cua » dai cua, lai cua, bai cua
hai cua » thai cua, dai cua, hoi cua
ma hoi » xa hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky nang ((ma hoi) or (mai hoi)). hieu vien sach luoc va thanh ((vai cua) OR (hai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ((ma hoi) OR (mai hoi)). hieu vien sach luoc va thanh ((vai cua) OR (hai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang ((ma hoi) or (mai hoi)). hieu vien sach luoc va thanh ((vai cua) OR (hai cua)) te".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((ma hoi) or (mai hoi)). hieu vien sach luoc va thanh ((vai cua) OR (hai cua)) te*.