Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hang tai » hang va, dung tai
hanh tai » thanh tai, han tai, hinh tai
nang xa » nang x, lang xa, nang ma
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
te sac » te sach, te cac, te san
dam tu » nam tu, cam tu, tam tu
sac ky » cac ky, sai ky
va dam » van dam, 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: te sac ky ((nang xa) or (tang ma)) hoi. hieu va dam tu va ((hanh tai) OR (hang tai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((nang xa) OR (tang ma)) hoi. hieu va dam tu va ((hanh tai) OR (hang tai)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((nang xa) or (tang ma)) hoi. hieu va dam tu va ((hanh tai) OR (hang tai)) cua triet".
• Adding a wildcard symbol may retrieve word variants: te sac ky ((nang xa) or (tang ma)) hoi. hieu va dam tu va ((hanh tai) OR (hang tai)) cua triet*.