Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh tap » thanh lap, thanh tai, thanh tay
cua triet » cua viet, su triet, va triet
cac nuoc » cap nuoc, dat nuoc, cua nuoc
so sach » so sanh, co sach, hoc sach
bo sach » co sach, hoc sach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
tap cua » tap quan, tiep cua
y lang » o lang, _ lang, tay lang

You may be able to get more results by adjusting your search query.

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