Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
lang van » dang van, tang van, hoang van
hieu van » hieu va, thien van, lieu va
nam thuc » am thuc, nam thu, nam tu
su sach » so sach, vu sach
ky lang » ky nang, ky dang, ky tang
van hoi » van hoa, van hoc, van hoe
minh vi » minh voi, dinh vi, minh va
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (su sach)) ky lang van hoi. hieu van ((nam thuc) OR (nam thuoc)) van minh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (su sach)) ky lang van hoi. hieu van ((nam thuc) OR (nam thuoc)) van minh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cac) or (su sach)) ky lang van hoi. hieu van ((nam thuc) OR (nam thuoc)) van minh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (su sach)) ky lang van hoi. hieu van ((nam thuc) OR (nam thuoc)) van minh vi cua tre*.