Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
hanh van » thanh van, khanh van, hanh san
thi hang » thi hanh, thi nang, thi hong
thuoc va » thuc va, thuoc ma, thuong va
su sach » so sach
hanh va » hang va, hanh vi
hieu ve » hieu va, hieu van
hang xa » hoang xa, hang va, hang ca
vu sach » vu bach, vu khach
ve nam » he nam, va nam, le nam

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) OR (vu sach)) thi hang xa hoi. hieu ve nam thuoc va ((hanh van) or (hanh va)) cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) thi hang xa hoi. hieu ve nam thuoc va ((hanh van) OR (hanh va)) cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) thi hang xa hoi. hieu ve nam thuoc va ((hanh van) or (hanh va)) cua vat".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) thi hang xa hoi. hieu ve nam thuoc va ((hanh van) or (hanh va)) cua vat*.