Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
ban hanh » ban hang
cau tren » cu tren, dau tren, ca tren
va cham » va tham
lanh ky » hanh ky, nganh ky, thanh ky
cao hoi » cau hoi, co hoi, cao hoc
va chat » van chat, va phat, cao chat
di cau » da cau, diem cau

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: thuat lanh ky nang cao hoi. hieu ((va cham) OR (va chat)) o ((ban hanh) OR (ca dao)) di cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat lanh ky nang cao hoi. hieu ((va cham) OR (va chat)) o ((ban hanh) or (ca dao)) di cau tren~".
• Adding a wildcard symbol may retrieve word variants: thuat lanh ky nang cao hoi. hieu ((va cham) OR (va chat)) o ((ban hanh) or (ca dao)) di cau tren*.