Perhaps you should try some spelling variations:
dang thanh » dong thanh, dang hanh, hoang thanh
su triet » su viet, su tien, ve triet
phan dau » phan tu, hang dau
thanh vi » hanh vi, thanh va, thanh ve
dau dang » da dang, dai dang, dau bang
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
sach ky » sach y, sach kem, sach hay
hieu ve » hieu va, hieu van
ve phan » va phan, ke phan, ve phat
sac ky » cac ky, sai ky
vi su » va su, ve su, ki 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 ky) OR (sac ky))) or (sach ty)) nang xa hoi. hieu ve phan dau dang thanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach ky) OR (sac ky))) OR (sach ty)) nang xa hoi. hieu ve phan dau dang thanh vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((((sach ky) OR (sac ky))) or (sach ty)) nang xa hoi. hieu ve phan dau dang thanh vi su triet".
• Adding a wildcard symbol may retrieve word variants: tu ((((sach ky) OR (sac ky))) or (sach ty)) nang xa hoi. hieu ve phan dau dang thanh vi su triet*.