Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
doanh dan » doanh ban, doanh van, doanh dao
hoa doanh » toan doanh, hoa dan
thuoc hoa » thuoc ho, thuoc nhom, hoc hoa
thien van » thi van
dang xay » dang van, van xay
hieu van » hieu va, lieu va, hieu ve
cua tre » cua te, cuu tre, cua triet
dan cua » dan ca, ban cua, dai cua
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
te cac » ve cac, te cao, de cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te cac) or (tu cac)) ky dang xay hoi. ((hieu van) OR (thien van)) lam thuoc hoa doanh dan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te cac) OR (tu cac)) ky dang xay hoi. ((hieu van) OR (thien van)) lam thuoc hoa doanh dan cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te cac) or (tu cac)) ky dang xay hoi. ((hieu van) OR (thien van)) lam thuoc hoa doanh dan cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te cac) or (tu cac)) ky dang xay hoi. ((hieu van) OR (thien van)) lam thuoc hoa doanh dan cua tre*.