Perhaps you should try some spelling variations:
thien van » thi van
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
bo sach » hoc sach
cua tre » cua te, cuu tre, cua triet
van hoc » van hoa
hoc tuc » hoc thuc, hoc truc, hoc tu
lo nang » ho nang, ly nang, loai nang
co sach » cuon sach, hoc sach
ca tren » cau tren, cu tren, la tren
tuc va » thuc va, truc va, tuc xa
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 (co sach)) lo nang x hoi. thien van hoc tuc va thanh vi ((cua tre) or (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((bo sach) OR (co sach)) lo nang x hoi. thien van hoc tuc va thanh vi ((cua tre) OR (ca tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bo sach) OR (co sach)) lo nang x hoi. thien van hoc tuc va thanh vi ((cua tre) or (ca tren))".
• Adding a wildcard symbol may retrieve word variants: ((bo sach) OR (co sach)) lo nang x hoi. thien van hoc tuc va thanh vi ((cua tre) or (ca tren))*.