Perhaps you should try some spelling variations:
cau thuc » cuu thuc, can thuc, cau phuc
ban hanh » ban hang
cau tren » cu tren, dau tren, ca tren
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
vi cau » va cau, ve cau, di 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 y nang xa hoi. lieu va ((cau thuc) OR (cau truc)) ban hanh vi cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang xa hoi. lieu va ((cau thuc) OR (cau truc)) ban hanh vi cau tren".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang xa hoi. lieu va ((cau thuc) OR (cau truc)) ban hanh vi cau tren*.