Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
pham duy » pham duc
thanh ke » thanh ket, thanh ve, thanh de
su triet » su viet, su tien, ve triet
sach tu » sach thu, cach tu, sach uu
sach ty » sach y, sach thu, xach tay
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
duy ban » uy ban, duy van, duy can
ke su » ke suu, ve su, ky 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 tu) or (sach ty)) nang xa hoi. hieu ve pham duy ban thanh ke su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (sach ty)) nang xa hoi. hieu ve pham duy ban thanh ke su triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) or (sach ty)) nang xa hoi. hieu ve pham duy ban thanh ke su triet*.