Perhaps you should try some spelling variations:
cam tuc » cam xuc, cam tu, nam thuc
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
ca cua » co cua
ca cuu » cap cuu, cua cuu, ca cau
va dan » ca dan, va dao, va dau
tuc va » thuc va, truc va, tuc xa
sac ky » cac ky
va cam » va cham, va cac, va cao

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

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