Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cao suc » cao su, cao duc
doi cua » hoi cua
sac ky » cac ky, sai ky
va cao » va cac, va co, va dao
suc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach y) or (sac ky)) nang xa hoi. hieu va cao suc va dan ((doi cua) OR (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach y) OR (sac ky)) nang xa hoi. hieu va cao suc va dan ((doi cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach y) or (sac ky)) nang xa hoi. hieu va cao suc va dan ((doi cua) OR (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sach y) or (sac ky)) nang xa hoi. hieu va cao suc va dan ((doi cua) OR (dai cua)) tre*.