Perhaps you should try some spelling variations:
thien van » thi van
hoc sach » hoc sinh, hoc cac, hoc anh
thanh vi » hanh vi, thanh va, thanh ve
thuc gia » thuc giai, thue gia, thuc dia
hai thuc » thai thuc, dai thuc, ha thuc
bo sach » co sach
cuu tre » cua tre, cau tren, cau treo
van hai » van ha, van chat, van hanh
lo nang » ho nang, ly nang, loai nang
ca tren » cau tren, cu tren, la tren
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: ((bo sach) or (hoc sach)) lo nang x hoi. thien van hai thuc gia thanh vi ((cuu tre) or (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((bo sach) OR (hoc sach)) lo nang x hoi. thien van hai thuc gia thanh vi ((cuu tre) OR (ca tren)).
• Adding a wildcard symbol may retrieve word variants: ((bo sach) or (hoc sach)) lo nang x hoi. thien van hai thuc gia thanh vi ((cuu tre) or (ca tren))*.