Perhaps you should try some spelling variations:
thuoc dang » thuoc dung, thuoc khang, thuc dan
nham thuoc » nha thuoc, nam thuoc, nham thuc
dang hanh » dang thanh, ban hanh, dang van
cua viet » hoa viet, cua vat, cua dieu
dang xay » dang van, van xay
hanh vai » hanh vi, hanh va, hanh tai
ca viet » va viet, co viet, hoa viet
hieu va » hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky dang xay hoi. ((hieu va) or (lieu va)) nham thuoc dang hanh vai ((cua viet) OR (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang xay hoi. ((hieu va) OR (lieu va)) nham thuoc dang hanh vai ((cua viet) OR (ca viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky dang xay hoi. ((hieu va) or (lieu va)) nham thuoc dang hanh vai ((cua viet) OR (ca viet))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang xay hoi. ((hieu va) or (lieu va)) nham thuoc dang hanh vai ((cua viet) OR (ca viet))*.