Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hieu vien » hieu viec, thieu nien, hieu tieng
bach duoc » bach tuoc, sach duoc, ban duoc
duoc gia » duoc giao, quoc gia, duc gia
thanh vi » hanh vi, thanh va, thanh ve
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
cua tre » cuu tre, cua triet, dua tren
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky dang xa hoi. ((hieu vien) or (hieu hien)) bach duoc gia thanh vi ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang xa hoi. ((hieu vien) OR (hieu hien)) bach duoc gia thanh vi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky dang xa hoi. ((hieu vien) or (hieu hien)) bach duoc gia thanh vi ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang xa hoi. ((hieu vien) or (hieu hien)) bach duoc gia thanh vi ((cua tre) OR (cua te))*.