Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cau tren » cu tren, dau tren, ca tren
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
cau tuc » cau truc, cau luc, cau phuc
y nang » ky nang, ly nang, v nang
cau tu » dau tu, cau truc
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 tuc) OR (cau tu)) van 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 tuc) OR (cau tu)) van hanh vi cau tren".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang xa hoi. lieu va ((cau tuc) OR (cau tu)) van hanh vi cau tren*.