Perhaps you should try some spelling variations:
hanh kien » danh kien, anh kien, thanh vien
su triet » su viet, su tien, ve triet
quoc ban » quoc bao, quoc lan, quoc quan
vuc nang » cuc nang, vu nang, chuc nang
nang mai » nang ma, nang tai, lang mai
sach vuc » sach duoc, sach nuoc, sach truc
hanh ki » hanh vi, hanh ky, thanh kim
tu sach » thu sach, su sach, te sach
xuc ban » duc ban, cuc ban, xuat ban
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
va cam » va cham, va cac, va cao

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 vuc nang mai hoi. hieu va cam ((xuc ban) or (quoc ban)) ((hanh ki) or (hanh kien)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach vuc nang mai hoi. hieu va cam ((xuc ban) OR (quoc ban)) ((hanh ki) OR (hanh kien)) su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach vuc nang mai hoi. hieu va cam ((xuc ban) or (quoc ban)) ((hanh ki) or (hanh kien)) su triet*.