Perhaps you should try some spelling variations:
thien van » thi van
cau thuc » cau truc, cuu thuc, can thuc
sach ty » sach tu, sach thu, xach tay
cau tra » ca tra, cau truc, cau thac
dinh va » dinh van, dinh ve, tinh va
va dinh » van dinh, va kinh, va tinh
thuc va » thuc vat, thuc dan, thuc day
van cau » van dau, van hau, van chat
lang xa » lang ha, dang xay, lang van
cau ra » cau ha, cau va, cau ca

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 ty) or (sach y)) lang xa hoi. thien van cau thuc va dinh va ((cau tra) OR (cau ra))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach y)) lang xa hoi. thien van cau thuc va dinh va ((cau tra) OR (cau ra)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach y)) lang xa hoi. thien van cau thuc va dinh va ((cau tra) OR (cau ra))".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach y)) lang xa hoi. thien van cau thuc va dinh va ((cau tra) OR (cau ra))*.