Perhaps you should try some spelling variations:
thanh gian » thanh giang, thach giang, thanh san
van thanh » ban thanh, van tuan
gian cua » gian xu, ban cua
tu sach » thu sach, su sach, tu cach
cac lop » cac hop, cac loai
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
cac lo » cac co, cac bo, cac 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) OR (te sach)) ky lang xa hoi. hieu ve ((cac lo) or (cac lop)) van thanh gian cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky lang xa hoi. hieu ve ((cac lo) OR (cac lop)) van thanh gian cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky lang xa hoi. hieu ve ((cac lo) or (cac lop)) van thanh gian cua tre*".