Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
ban hanh » ban hang
tu cach » tu cac
cach tu » cach thuc
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
nam xua » nam cua, nam mua, nam qua
xua ban » xuat ban, cua ban, qua ban
cua te » cua tu

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

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