Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
cau thuc » cau truc, cuu thuc, can thuc
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
cau tren » cu tren, dau tren, ca tren
vu sach » vu bach, su sach
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) OR (vu khach)) y nang xa hoi. lieu va cau thuc van hanh vi cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu khach)) y nang xa hoi. lieu va cau thuc van hanh vi cau tren".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu khach)) y nang xa hoi. lieu va cau thuc van hanh vi cau tren*.