Perhaps you should try some spelling variations:
tu cham » toc cham, thi cham
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
cham ky » pham ky, cam ky
ca tren » cau tren, cu tren, la tren
mai hoi » mai khoi, dai hoi, lai hoi
va cam » va cham, va cac, va cao
ma hoi » xa hoi, ma hoa, me hoi
ve cac » va cac, vien cac
vi ca » vit ca, li ca, va ca

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: tu cham ky nang ((ma hoi) OR (mai hoi)). hieu ((ve cac) OR (va cam)) thuc va hanh vi ca tren~.
• Adding a wildcard symbol may retrieve word variants: tu cham ky nang ((ma hoi) or (mai hoi)). hieu ((ve cac) or (va cam)) thuc va hanh vi ca tren*.