Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
ban thanh » ban hanh, ban hang
ve triet » va trien, su triet
sach nay » sach hay, sach vay, sach nang
va triet » va thiet, va trien, cua triet
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
nay lang » nam lang, tay lang, nhan lang
cac cua » cach cua, cac qua, ca cua
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
su sach » so sach, vu sach

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 nay lang xa hoi. hieu va ((cac cua) or (cac nuoc)) ban thanh lap ((va triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach nay lang xa hoi. hieu va ((cac cua) OR (cac nuoc)) ban thanh lap ((va triet) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: su sach nay lang xa hoi. hieu va ((cac cua) or (cac nuoc)) ban thanh lap ((va triet) or (ve triet))*.