Perhaps you should try some spelling variations:
thien van » thi van
cua thuoc » nha thuoc, cay thuoc, cua nuoc
hieu van » hieu va, lieu va, hieu ve
cham duc » pham duc, cham soc, pham duy
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
ky dang » ky nang
ky danh » ky anh
duc van » duc va, duc tan, duc manh
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ky dang) OR (ky danh)) ha noi. ((hieu van) or (thien van)) cham duc van hanh vi cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky dang) OR (ky danh)) ha noi. ((hieu van) OR (thien van)) cham duc van hanh vi cua thuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky dang) OR (ky danh)) ha noi. ((hieu van) or (thien van)) cham duc van hanh vi cua thuoc".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky dang) OR (ky danh)) ha noi. ((hieu van) or (thien van)) cham duc van hanh vi cua thuoc*.