Perhaps you should try some spelling variations:
thieu bien » thieu nien, tieu bieu, hien bien
ban thanh » ban hanh, ban hang
bien cac » vien cac, dien cac, bien ca
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cac duc » cac du, cao duc, cac dac
duc ban » duc tan, duc van, dua ban
vai cua » dai cua, hai cua, lai cua

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. thieu bien cac duc ban thanh ((vai cuu) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. thieu bien cac duc ban thanh ((vai cuu) OR (vai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. thieu bien cac duc ban thanh ((vai cuu) or (vai cua)) tre*.