Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam tu
so sanh » do sanh
dan cua » dan ca, ban cua, dai cua
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
va dan » va dao, va dau, va dap
ca dan » cac dan, ca dao
cua te » cua tu
sanh y » sinh y, anh y, hanh y
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: so sanh y lang xa hoi. hieu ve ((nam thuc) or (nam thu)) ((va dan) OR (ca dan)) dan cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh y lang xa hoi. hieu ve ((nam thuc) OR (nam thu)) ((va dan) OR (ca dan)) dan cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh y lang xa hoi. hieu ve ((nam thuc) or (nam thu)) ((va dan) OR (ca dan)) dan cua te".
• Adding a wildcard symbol may retrieve word variants: so sanh y lang xa hoi. hieu ve ((nam thuc) or (nam thu)) ((va dan) OR (ca dan)) dan cua te*.