Perhaps you should try some spelling variations:
sang dieu » dang dieu, hang dien
dieu cua » dieu tra
thu sach » tu sach, thuat sach, thuoc sach
dai sang » dai dang, dai nang, dai hang
vien cac » vien bach, vien dai, vien da
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
bac dai » bach mai
tu sac » tu sach, tu cac, tu san
ve cac » va cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (thu sach)) ky nang xa hoi. hieu ((ve cac) OR (vien cac)) bac dai sang dieu cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) or (thu sach)) ky nang xa hoi. hieu ((ve cac) OR (vien cac)) bac dai sang dieu cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (thu sach)) ky nang xa hoi. hieu ((ve cac) OR (vien cac)) bac dai sang dieu cua tre*.