Perhaps you should try some spelling variations:
dang khoi » dung khoa, hang khoa
dang khai » dang hai, quang khai, dang thi
thu sach » tu sach, thuat sach, thuoc sach
xuc ban » duc ban, cuc ban, quoc ban
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
lang xa » lang ha, dang xay, lang van
cua tu » cua tuc, cua su, cua cu

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 ty ((lang xa) or (nang ma)) hoi. hieu va cac xuc ban ((dang khai) OR (dang khoi)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((lang xa) OR (nang ma)) hoi. hieu va cac xuc ban ((dang khai) OR (dang khoi)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty ((lang xa) or (nang ma)) hoi. hieu va cac xuc ban ((dang khai) OR (dang khoi)) cua tu".
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((lang xa) or (nang ma)) hoi. hieu va cac xuc ban ((dang khai) OR (dang khoi)) cua tu*.