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

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 ma 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 ma 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 ma hoi. thien van nam thu ban ((thanh ca) or (thanh cha)) ((cuu tre) or (cau tren))*.