Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van ban
tham luc » than luc, tham nuoc, tham thuc
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
lang xa » lang ha, dang xay, lang van
mang xa » mang may, dang xay, mang cua
van anh » van thanh, tuan anh, van minh
san ky » sang ky, van ky, dan ky
vi cua » vai cua, di cua
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 ((mang xa) or (lang xa)) hoi. hieu van tham luc ((van hanh) or (van anh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky ((mang xa) OR (lang xa)) hoi. hieu van tham luc ((van hanh) OR (van anh)) vi cua triet.
• Adding a wildcard symbol may retrieve word variants: tu san ky ((mang xa) or (lang xa)) hoi. hieu van tham luc ((van hanh) or (van anh)) vi cua triet*.