Perhaps you should try some spelling variations:
dieu vien » dieu kien, dieu hien, dieu khien
vien cac » vien bach, vien dai, vien da
danh ca » dan ca, doanh cua, danh gia
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet
sach ty » sach tu, sach thu, xach tay
xuc va » duc va, tuc va, luc va
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 ty) or (sach y)) nang x hoi. dieu vien cac xuc va ((danh ca) OR (danh cho)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) nang x hoi. dieu vien cac xuc va ((danh ca) OR (danh cho)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach y)) nang x hoi. dieu vien cac xuc va ((danh ca) OR (danh cho)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach y)) nang x hoi. dieu vien cac xuc va ((danh ca) OR (danh cho)) cua tre*.