Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
sach tay » xach tay, sach hay, sach nay
van hanh » van thanh, ban hanh, van anh
truc van » truc va, thuc van, truc ban
cam truc » cau truc, nam truc, lam truoc
hieu van » thien van, lieu va, hieu ve
tay tang » tay lang, tay trung, tay quang
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
cua tuc » cua duc, cua tu, luat tuc
te sach » toc sach

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 tay tang xa hoi. ((hieu va) or (hieu van)) cam truc van hanh vi ((cua tuc) OR (cua thuoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tay tang xa hoi. ((hieu va) OR (hieu van)) cam truc van hanh vi ((cua tuc) OR (cua thuoc))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tay tang xa hoi. ((hieu va) or (hieu van)) cam truc van hanh vi ((cua tuc) OR (cua thuoc))*".