Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
nuoc ban » nuoc san, quoc ban, buoc ban
tiep cua » tiep can, dieu cua, tiep va
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
tap cua » tap quan
y lang » o lang, tay lang, yen lang
_ lang » o lang, _ land

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 ((y lang) or (_ lang)) xa hoi. hieu va cac nuoc ban thanh ((tap cua) OR (tiep cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y lang) OR (_ lang)) xa hoi. hieu va cac nuoc ban thanh ((tap cua) OR (tiep cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y lang) or (_ lang)) xa hoi. hieu va cac nuoc ban thanh ((tap cua) OR (tiep cua)) triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((y lang) or (_ lang)) xa hoi. hieu va cac nuoc ban thanh ((tap cua) OR (tiep cua)) triet*.