Perhaps you should try some spelling variations:
thuc dung » thuoc dung, thuy dung, tuc dung
thuc dang » thuoc dang, thuc dan, thu dang
ky lang » ky dang, ky tang, tay lang
van hoi » van hoa, van hoc, van hoe
hieu va » lieu va, hieu qua
vu san » va san, vu ban
vi cua » vai cua, di cua
cua te » cua tu
va am » va lam, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu san ((ky lang) or (ky nang)) van hoi. hieu va am ((thuc dang) OR (thuc dung)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu san ((ky lang) OR (ky nang)) van hoi. hieu va am ((thuc dang) OR (thuc dung)) hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu san ((ky lang) or (ky nang)) van hoi. hieu va am ((thuc dang) OR (thuc dung)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: vu san ((ky lang) or (ky nang)) van hoi. hieu va am ((thuc dang) OR (thuc dung)) hanh vi cua te*.