Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ngu hanh » ngu anh, ngu danh, luu hanh
va thanh » gia thanh, ban thanh, va tinh
lang ha » long ha
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
hanh di » hanh vi, hanh de, danh di
hang di » hang doi, hang vi, hang dien
san ky » sang ky, van ky, dan ky
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky ((nang xa) or (lang ha)) hoi. hieu va thanh ngu hanh ((hanh di) OR (hang di)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky ((nang xa) OR (lang ha)) hoi. hieu va thanh ngu hanh ((hanh di) OR (hang di)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky ((nang xa) or (lang ha)) hoi. hieu va thanh ngu hanh ((hanh di) OR (hang di)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu san ky ((nang xa) or (lang ha)) hoi. hieu va thanh ngu hanh ((hanh di) OR (hang di)) cua triet*.