Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
thanh di » thanh doi, thanh de, thanh do
va thanh » gia thanh, ban thanh, va tinh
sach tu » sach thu, cach tu, sach ty
ve phan » va phan, ke phan, ve phat
nang xa » nang x, lang xa, nang ma
ve pham » vi pham, v pham, ve phat
duy va » duy vat, duy van, day va
di su » doi su, ki su, da 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 y)) nang xa hoi. hieu ((ve pham) OR (ve phan)) duy va thanh di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (sach y)) nang xa hoi. hieu ((ve pham) OR (ve phan)) duy va thanh di su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tu) or (sach y)) nang xa hoi. hieu ((ve pham) OR (ve phan)) duy va thanh di su triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) or (sach y)) nang xa hoi. hieu ((ve pham) OR (ve phan)) duy va thanh di su triet*.