Perhaps you should try some spelling variations:
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
qua cac » cua cac
cac duc » cac du, cao duc, cac dac
va hanh » van hanh, va thanh, va danh
su cao » cu cao, vu cao, su co
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cao ky ((nang xa) OR (lang xa)) hoi. hieu qua cac duc va hanh ((vi cua) or (di cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cao ky ((nang xa) OR (lang xa)) hoi. hieu qua cac duc va hanh ((vi cua) OR (di cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cao ky ((nang xa) OR (lang xa)) hoi. hieu qua cac duc va hanh ((vi cua) or (di cua)) triet*".