Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
tuc va » thuc va, truc va, duc va
va cam » va cham, va cac, va cao
ve ve » de ve, ke ve, ve ke
va ve » va de, va le, va vi

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

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