Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
bach duoc » bach tuoc, sach duoc, ban duoc
duoc gia » duoc giao, quoc gia, duc gia
thanh vi » hanh vi, thanh va, nhanh vi
thanh ve » hanh ve, thanh va, thanh vien
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cua te » cua tu
x hoi » o hoi, x ho, 5 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 sach ky nang ((x hoi) OR (xa hoi)). hieu vien bach duoc gia ((thanh vi) or (thanh ve)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((x hoi) OR (xa hoi)). hieu vien bach duoc gia ((thanh vi) OR (thanh ve)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((x hoi) OR (xa hoi)). hieu vien bach duoc gia ((thanh vi) or (thanh ve)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((x hoi) OR (xa hoi)). hieu vien bach duoc gia ((thanh vi) or (thanh ve)) cua te*.