Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va thanh » gia thanh, va tinh, le thanh
cau tren » cu tren, dau tren, ca tren
ky tang » ky dang, kho tang, ky trong
hieu va » lieu va, hieu qua
bao luc » bao thuc
te ban » te bao
va bao » va bai
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: te ban ((ky tang) or (ky nang)) xa hoi. hieu va bao luc ((va thanh) OR (ban thanh)) vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ban ((ky tang) OR (ky nang)) xa hoi. hieu va bao luc ((va thanh) OR (ban thanh)) vi cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ban ((ky tang) or (ky nang)) xa hoi. hieu va bao luc ((va thanh) OR (ban thanh)) vi cau tren".
• Adding a wildcard symbol may retrieve word variants: te ban ((ky tang) or (ky nang)) xa hoi. hieu va bao luc ((va thanh) OR (ban thanh)) vi cau tren*.