Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cau thuc » cau truc, cuu thuc, can thuc
van hanh » ban hanh, van anh, van ban
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
va cau » van cau, va cac, va dau
vi cau » ve cau, di cau, viet 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 ((van hanh) OR (van thanh)) 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 ((van hanh) OR (van thanh)) vi cau tren".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang xa hoi. lieu va cau thuc ((van hanh) OR (van thanh)) vi cau tren*.