Perhaps you should try some spelling variations:
thien van » thi van
doanh van » doan van, doanh va, doanh ban
cay thuoc » cua thuoc, nam thuoc, va thuoc
ban thua » bac thua, ban thu, ban thuoc
va doanh » van doanh, vay doanh, va danh
van cua » vang cua, ban cua, dan cua
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((nang xa) OR (nang ma)) hoi. thien van ((ban thua) or (cay thuoc)) va doanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (nang ma)) hoi. thien van ((ban thua) OR (cay thuoc)) va doanh van cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang xa) OR (nang ma)) hoi. thien van ((ban thua) or (cay thuoc)) va doanh van cua tre*".