Perhaps you should try some spelling variations:
dat thanh » dao thanh, dat khanh, dang thanh
ban hang » ngan hang
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2
ve cam » ve cham, va cam, ve cai
v nang » va nang, vu nang, van nang
di cua » dai cua, doi cua, de cua
ve cac » va cac, vien cac
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: su sach v nang x hoi. hieu ((ve cam) OR (ve cac)) thuc ((dat thanh) or (ban hang)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang x hoi. hieu ((ve cam) OR (ve cac)) thuc ((dat thanh) OR (ban hang)) di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v nang x hoi. hieu ((ve cam) OR (ve cac)) thuc ((dat thanh) or (ban hang)) di cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach v nang x hoi. hieu ((ve cam) OR (ve cac)) thuc ((dat thanh) or (ban hang)) di cua tre*.