Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
va triet » va thiet, va trien, ve triet
quoc ban » quoc bao, quoc lan, quoc quan
hieu van » hieu va, thien van, lieu va
xuc ban » duc ban, cuc ban, xuat ban
su sach » so sach
nang xa » nang x, lang xa, nang ma
vu sach » vu bach, vu khach
van dau » van dao, phan dau
hai va » hai van, thai va, hoi va

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) or (vu sach)) ky nang xa hoi. hieu van dau ((xuc ban) OR (quoc ban)) thanh hai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang xa hoi. hieu van dau ((xuc ban) OR (quoc ban)) thanh hai va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky nang xa hoi. hieu van dau ((xuc ban) OR (quoc ban)) thanh hai va triet*".