Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban thuoc » dang thuoc, cay thuoc, nam thuoc
hieu viec » nhieu viec, hieu ve, sieu viet
thuoc va » thuc va, thuoc ma, thuong va
viec ban » viec lam, viec va, viec tai
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
va danh » va dinh, va dan, va hanh
danh tu » anh tu, doanh thu
cua tre » cua te, cuu tre, dua tren
sac ky » cac ky, sai ky
so sac » so sach, so dac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ky ((nang xa) OR (nang ma)) hoi. hieu viec ban thuoc va danh tu ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sac ky ((nang xa) or (nang ma)) hoi. hieu viec ban thuoc va danh tu ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: so sac ky ((nang xa) or (nang ma)) hoi. hieu viec ban thuoc va danh tu ((cua tre) OR (cua triet))*.