Perhaps you should try some spelling variations:
thieu nien » thien nhien
bach tuoc » sach duoc, sach nuoc
hieu vien » hieu hien, hieu viec, hieu tieng
thanh ve » hanh ve, thanh va, thanh vien
tuoc gia » quoc gia, toc gia, luoc gia
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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. ((hieu vien) OR (thieu nien)) bach tuoc gia ((hanh 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. ((hieu vien) OR (thieu nien)) bach tuoc gia ((hanh 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. ((hieu vien) OR (thieu nien)) bach tuoc gia ((hanh vi) or (thanh ve)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. ((hieu vien) OR (thieu nien)) bach tuoc gia ((hanh vi) or (thanh ve)) cua te*.