Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van khang » van khanh, van thanh, van quang
cau thuc » cau truc, cuu thuc, can thuc
van hang » van hoang, van thang, ban hang
nuoc gac » nuoc giai, nuoc giao, nuoc sach
hieu ve » hieu va, hieu van
lang ha » long ha
nang xa » nang x, lang xa, nang ma
gac ky » cac ky, sac ky, bac ky
vi cua » vai cua, di cua
ve cau » ke cau, va cau, ve cac

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

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