Perhaps you should try some spelling variations:
thien van » thi van
ban banh » ban hanh, ban anh, ban danh
dua tren » dung tren
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
nam mua » nam cua, nam qua, nam xua
mua ban » cua ban, qua ban
banh ve » ban ve, hanh ve, benh ve
cua tre » cua te, cuu tre, cua triet

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 ky nang xa hoi. thien van nam mua ban banh ve ((dua tren) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. thien van nam mua ban banh ve ((dua tren) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. thien van nam mua ban banh ve ((dua tren) or (cua tre))*.