Perhaps you should try some spelling variations:
dieu hien » dieu khien, dieu kien, bieu hien
hieu vien » hieu viec, thieu nien, hieu tieng
hieu hien » bieu hien, chieu chien, dieu khien
su sach » so sach, vu sach
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
cac dai » cac dan, cac bai, can dai
cua tre » cua te, cuu tre, cua triet
nang co » nang cao, nang doc, nang noi
sach ky » sac ky, sach y, sach ty
dai va » mai va
co hai » co dai, co hoi, o hai
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang co hai. ((hieu vien) or (((hieu hien) or (dieu hien)))) cac dai va tinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang co hai. ((hieu vien) OR (((hieu hien) OR (dieu hien)))) cac dai va tinh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang co hai. ((hieu vien) or (((hieu hien) or (dieu hien)))) cac dai va tinh vi cua tre*.