Perhaps you should try some spelling variations:
dung tren » dung trong, dung trung
cua triet » cua viet, su triet, va triet
tham luc » than luc, tham nuoc, tham thuc
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
tu van » tu va
luc va » duc va, tuc va, loc va

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

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