Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
sach ky » sac ky, sach y, sach ty
danh di » danh du, xanh di, danh dien
danh vi » hanh vi, dinh vi, danh va
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va, loc va

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 lang xa hoi. hieu ((ve cam) or (vien cac)) luc va ((danh vi) or (danh di)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. hieu ((ve cam) OR (vien cac)) luc va ((danh vi) OR (danh di)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. hieu ((ve cam) or (vien cac)) luc va ((danh vi) or (danh di)) cuu tre*.