Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
lang mai » lang dai, lang hai, lang man
luat tuc » luat thue
van hanh » van thanh, ban hanh, van anh
vuc van » duc van, luc van, thuc van
su sach » so sach, vu sach
va cham » va chat, va tham
ve cham » ve chat, vu cham, ve chim
mai hoi » mai khoi, dai hoi, lai hoi
y lang » o lang, _ lang, tay lang

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 y lang mai hoi. hieu ((ve cham) or (va cham)) vuc van hanh vi ((luat tuc) or (cua thuoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y lang mai hoi. hieu ((ve cham) OR (va cham)) vuc van hanh vi ((luat tuc) OR (cua thuoc)).
• Adding a wildcard symbol may retrieve word variants: su sach y lang mai hoi. hieu ((ve cham) or (va cham)) vuc van hanh vi ((luat tuc) or (cua thuoc))*.