Perhaps you should try some spelling variations:
dang hanh » dang thanh, ban hanh, dang van
cua triet » su triet, va triet
thuc dang » thuoc dang, thuc dan, thuc dung
cua viet » ca viet, hoa viet, cua vat
nam thuc » nam thuoc, am thuc, nam thu
hanh vai » hanh vi, hanh va, hanh tai
sach ky » sach y, sach ty, sach kem
nang ma » tang ma, sang ma, nang cao
hieu ha » hieu hoa, hieu va, hieu ca
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky, sai ky

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