Perhaps you should try some spelling variations:
dang thanh » dong thanh, hoang thanh, quang thanh
dang hanh » ban hanh, dang van, dang hung
su triet » su viet, su tien, ve triet
sach ky » sach y, sach ty, sach kem
hieu ha » hieu hoa, hieu va, hieu ca
lang xa » lang ha, dang xay, lang van
sac ky » cac ky, sai ky
vai su » va su, van su, lai su
ha am » hoa am, ha nam, ha lam

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 ky) or (sac ky)) lang xa hoi. hieu ha am thuc ((dang hanh) OR (dang thanh)) vai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) lang xa hoi. hieu ha am thuc ((dang hanh) OR (dang thanh)) vai su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sac ky)) lang xa hoi. hieu ha am thuc ((dang hanh) OR (dang thanh)) vai su triet*".