Perhaps you should try some spelling variations:
cau thuc » cau truc, cuu thuc, can thuc
thuc ban » thuoc ban, thuc dan, thu ban
ban hanh » ban hang
vu sach » vu bach, su sach, vu khach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
va cau » van cau, va cac, va dau
vi cau » di cau, viet cau
ve cau » ke cau, ve cac, le cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ly nang ma hoi. lieu va cau thuc ban hanh ((vi cau) or (ve cau)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ly nang ma hoi. lieu va cau thuc ban hanh ((vi cau) OR (ve cau)) tren.
• Adding a wildcard symbol may retrieve word variants: vu sach ly nang ma hoi. lieu va cau thuc ban hanh ((vi cau) or (ve cau)) tren*.