Perhaps you should try some spelling variations:
thuc dang » thuoc dang, thuc dan, thuc dung
dang hanh » dang thanh, ban hanh, dang van
ve triet » va trien
su triet » su viet, su tien
hanh vai » hanh vi, hanh va, hanh tai
sach ty » sach y, sach tu, sach thu
hieu ha » hieu hoa, hieu va, hieu ca
lang xa » lang ha, dang xay, lang van
sac ky » cac ky, sai ky
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 ty) or (sac ky)) lang xa hoi. hieu ha am thuc dang hanh vai ((su triet) OR (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sac ky)) lang xa hoi. hieu ha am thuc dang hanh vai ((su triet) OR (ve triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) or (sac ky)) lang xa hoi. hieu ha am thuc dang hanh vai ((su triet) OR (ve triet))*".