Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
tinh vai » tinh va, tinh hai, tinh bai
lam thuc » lam thuoc, am thuc, nam thuc
hieu van » hieu va, thien van, hieu ve
ly hang » ly quang
thuc va » thuc vat, thuc dan, thuc day
va tinh » may tinh
ly nang » ky nang, ly vang, ly quang
te sach » toc sach
ma hoi » mai hoi, xa hoi, ma hoa
vai va » mai va, dai va, hai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ly nang) OR (ly hang)) ma hoi. ((hieu van) or (lieu va)) lam thuc va tinh vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ly nang) OR (ly hang)) ma hoi. ((hieu van) OR (lieu va)) lam thuc va tinh vai va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ly nang) OR (ly hang)) ma hoi. ((hieu van) or (lieu va)) lam thuc va tinh vai va triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((ly nang) OR (ly hang)) ma hoi. ((hieu van) or (lieu va)) lam thuc va tinh vai va triet*.