Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van danh » van doanh, van anh, van hanh
dan danh » han danh, ban danh, dai danh
cau thuc » cau truc, cuu thuc, can thuc
so sach » so sanh, bo sach, co sach
van cau » van dau, van hau, van chat
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y ((nang xa) or (nang ma)) hoi. hieu van cau thuc ((dan danh) or (van danh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((nang xa) OR (nang ma)) hoi. hieu van cau thuc ((dan danh) OR (van danh)) vi cua te.
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang xa) or (nang ma)) hoi. hieu van cau thuc ((dan danh) or (van danh)) vi cua te*.