Perhaps you should try some spelling variations:
sach vuc » sach duoc, sach nuoc, sach truc
vuc nang » cuc nang, vu nang, chuc nang
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
su hien » su kien, su tien, thu hien
ve su » va su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach vuc nang xa hoi. hieu va cac nuoc ((van hanh) OR (ban hanh)) ve su hien~.
• Adding a wildcard symbol may retrieve word variants: tu sach vuc nang xa hoi. hieu va cac nuoc ((van hanh) or (ban hanh)) ve su hien*.