Perhaps you should try some spelling variations:
thien van » thi van
nam thuoc » nam thuc, nam thu, nha thuoc
nang viet » anh viet
thuoc va » thuc va, thuoc ma, thuong va
nang via » nang va, nang giao, nang vinh
nang xa » lang xa, nang ma, mang xa
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ky ((nang xa) or (nang x)) hoi. thien van nam thuoc va ((nang via) OR (nang viet)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky ((nang xa) OR (nang x)) hoi. thien van nam thuoc va ((nang via) OR (nang viet)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky ((nang xa) or (nang x)) hoi. thien van nam thuoc va ((nang via) OR (nang viet)) cua te".
• Adding a wildcard symbol may retrieve word variants: vu sac ky ((nang xa) or (nang x)) hoi. thien van nam thuoc va ((nang via) OR (nang viet)) cua te*.