Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
thi hang » thi hanh, thi nang, thi hong
hieu van » hieu va, thien van, lieu va
te sach » toc sach
ty hang » ly hang, ty xang, thu hang
van hac » van hoc, van ha, van hai
duc van » duc tan, duc manh, duc phan
ma hoi » mai hoi, xa hoi, ma hoa
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: te sach ((ty hang) OR (thi hang)) ma hoi. hieu van hac ((duc van) or (duc va)) hanh vi cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty hang) OR (thi hang)) ma hoi. hieu van hac ((duc van) OR (duc va)) hanh vi cua thuoc*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty hang) OR (thi hang)) ma hoi. hieu van hac ((duc van) or (duc va)) hanh vi cua thuoc*".