Perhaps you should try some spelling variations:
hang dau » hang va, hang tai
lang van » dang van, tang van, hoang van
hang dam » chang dam, hang nam, hung dam
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
duc ban » duc tan, duc van, dua ban
so viet » hoc viet
xuc ban » cuc ban, quoc ban, xuat ban
hieu va » lieu va, hieu qua
van hoi » van hoa, van hoc, van hoe
ky lang » ky nang, ky dang, ky tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky lang van hoi. hieu va cac ((xuc ban) or (duc ban)) ((hang dam) OR (hang dau)) so viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang van hoi. hieu va cac ((xuc ban) OR (duc ban)) ((hang dam) OR (hang dau)) so viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky lang van hoi. hieu va cac ((xuc ban) or (duc ban)) ((hang dam) OR (hang dau)) so viet".
• Adding a wildcard symbol may retrieve word variants: su sach ky lang van hoi. hieu va cac ((xuc ban) or (duc ban)) ((hang dam) OR (hang dau)) so viet*.