Perhaps you should try some spelling variations:
quoc ban » quoc bao, quoc lan, quoc quan
thanh vi » hanh vi, thanh va, thanh ve
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
xuc ban » duc ban, cuc ban, xuat ban
sach v » sach va, sach y, sach vay
sach 2 » sach y
va cam » va cham, va cac, va cao
vi su » va su, ve su, ki su

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 v) or (sach 2)) nang xa hoi. lieu va cam ((xuc ban) OR (quoc ban)) thanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach v) OR (sach 2)) nang xa hoi. lieu va cam ((xuc ban) OR (quoc ban)) thanh vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach v) or (sach 2)) nang xa hoi. lieu va cam ((xuc ban) OR (quoc ban)) thanh vi su triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach v) or (sach 2)) nang xa hoi. lieu va cam ((xuc ban) OR (quoc ban)) thanh vi su triet*.