Perhaps you should try some spelling variations:
hanh kien » danh kien, anh kien, thanh vien
thu sach » tu sach, thuat sach, thuoc sach
sach vuc » sach duoc, sach nuoc, sach truc
vuc nang » cuc nang, vu nang, chuc nang
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
nang ma » tang ma, sang ma, nang cao
xuc van » duc van, luc van, vuc van
kien su » nien su, tien su, vien sau
ma hoi » mai hoi, xa hoi, ma hoa
va cao » va co, va dao, va bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach vuc nang ma hoi. hieu ((va cac) or (va cao)) xuc van hanh kien su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach vuc nang ma hoi. hieu ((va cac) OR (va cao)) xuc van hanh kien su triet.
• Adding a wildcard symbol may retrieve word variants: thu sach vuc nang ma hoi. hieu ((va cac) or (va cao)) xuc van hanh kien su triet*.