Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
quoc ban » quoc bao, quoc lan, quoc quan
dua tren » dung tren
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
xuc ban » duc ban, cuc ban, xuat ban
va cam » va cham, va cac, va cao
ban ve » ban va
cua te » cua tu

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 thu nang xa hoi. lieu va cam ((xuc ban) OR (quoc ban)) ban ve ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu nang xa hoi. lieu va cam ((xuc ban) OR (quoc ban)) ban ve ((dua tren) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thu nang xa hoi. lieu va cam ((xuc ban) OR (quoc ban)) ban ve ((dua tren) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach thu nang xa hoi. lieu va cam ((xuc ban) OR (quoc ban)) ban ve ((dua tren) or (cua te))*.