Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
thien van » thi van
thi hanh » thi thanh
thuc va » thuc vat, thuc dan, thuc day
tai cua » thai cua, tai cuc, tri cua
co sach » bo sach, cuon sach, hoc sach
dang xa » dang xay, lang xa, dang ha
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
sach 2 » sach y
2 dang » 2 danh, _ dang, b dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach 2 dang xa hoi. ((thien van) or (thi hanh)) cam ((xuc va) or (thuc va)) thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach 2 dang xa hoi. ((thien van) OR (thi hanh)) cam ((xuc va) OR (thuc va)) thanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: co sach 2 dang xa hoi. ((thien van) or (thi hanh)) cam ((xuc va) or (thuc va)) thanh tai cua tre*.