Perhaps you should try some spelling variations:
hanh sinh » hanh tinh, hanh dinh, hinh sinh
sinh cuu » dinh cuu, sinh cua, sinh cau
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
qua nam » quan nam, cua nam, quang nam
luc van » luoc van, luu van, duc van
xuc ban » cuc ban, quoc ban, xuat ban
duc ban » duc tan, duc van, dua ban
cuu tre » cua tre, cau tren, 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: tu sach ky nang xa hoi. hieu qua nam ((luc van) or (((xuc ban) or (duc ban)))) hanh sinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu qua nam ((luc van) OR (((xuc ban) OR (duc ban)))) hanh sinh cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu qua nam ((luc van) or (((xuc ban) or (duc ban)))) hanh sinh cuu tre*.