Perhaps you should try some spelling variations:
nhung thuoc » dung thuoc, nhung cuoc, nhung khuc
thuoc quyen » thuoc chuyen, thuoc nguyen, hoc quyen
bien quang » dien quang, trien quang, lien quan
quyen van » quyet van, huyen van, nguyen van
biet quan » viet quan, viet quang, lien quan
trong tan » trong quan, trong ca, cong tan

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

• Performing a fuzzy search may retrieve terms with similar spellings: nhung thuoc quyen van. ((biet quan) OR (bien quang)) ((trong tan) or (trong cac)) than~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nhung thuoc quyen van. ((biet quan) OR (bien quang)) ((trong tan) OR (trong cac)) than.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nhung thuoc quyen van. ((biet quan) OR (bien quang)) ((trong tan) or (trong cac)) than".
• Adding a wildcard symbol may retrieve word variants: nhung thuoc quyen van. ((biet quan) OR (bien quang)) ((trong tan) or (trong cac)) than*.