Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
cham tuc » nham thuc, pham thuc, tham thuc
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
tuc van » thuc van, truc van, tuc va
cua tuc » cua duc, luat tuc, cua nuoc
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang
cua tu » cua su, cua cu, cua te

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach o lang xa hoi. hieu ve cham tuc van hanh vi ((cua tu) OR (((cua tuc) OR (cua thuoc))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach o lang xa hoi. hieu ve cham tuc van hanh vi ((cua tu) or (((cua tuc) OR (cua thuoc))))~".
• Adding a wildcard symbol may retrieve word variants: te sach o lang xa hoi. hieu ve cham tuc van hanh vi ((cua tu) or (((cua tuc) OR (cua thuoc))))*.