Perhaps you should try some spelling variations:
thien van » thi van
thanh cha » thanh ha, thanh nha, thanh phan
thanh ca » thanh cac, thanh ha, thanh va
cau tren » cu tren, dau tren, ca tren
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
thu ban » thu hang
cuu tre » cua tre, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang xa hoi. thien van nam thu ban ((thanh ca) OR (thanh cha)) ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. thien van nam thu ban ((thanh ca) OR (thanh cha)) ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang xa hoi. thien van nam thu ban ((thanh ca) OR (thanh cha)) ((cuu tre) or (cau tren))".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. thien van nam thu ban ((thanh ca) OR (thanh cha)) ((cuu tre) or (cau tren))*.