Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
van quan » van ban
chau tre » chay tren, chau tho, cho tre
hoc sac » hoc sach, hoc cac, hoc mac
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
sac ky » cac ky, sai ky
ma hoi » xa hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam

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: hoc sac ky nang ((ma hoi) OR (mai hoi)). hieu ve cam xuc ((van hanh) OR (van quan)) lai chau tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sac ky nang ((ma hoi) OR (mai hoi)). hieu ve cam xuc ((van hanh) or (van quan)) lai chau tre~".
• Adding a wildcard symbol may retrieve word variants: hoc sac ky nang ((ma hoi) OR (mai hoi)). hieu ve cam xuc ((van hanh) or (van quan)) lai chau tre*.