Perhaps you should try some spelling variations:
thien van » thi van
xanh hanh » danh thanh, ban hanh, van hanh
thu sach » tu sach, thuat sach, thuoc sach
cau thuc » cau truc, cuu thuc, cau phuc
can thuc » dan thuc, van thuc, cay thuc
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
sach ky » sac ky, sach y, sach ty
hanh te » hanh tu, hanh ve, hanh de
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky lang xa hoi. thien van ((cau thuc) OR (can thuc)) xanh hanh te ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky lang xa hoi. thien van ((cau thuc) OR (can thuc)) xanh hanh te ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky lang xa hoi. thien van ((cau thuc) OR (can thuc)) xanh hanh te ((cua te) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky lang xa hoi. thien van ((cau thuc) OR (can thuc)) xanh hanh te ((cua te) or (cua tu))*.