Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
dang mai » dang hai, dang mau, dang bai
ve chat » va chat, van chat
vai cua » hai cua, lai cua, bai cua
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
ky dang » ky nang, ky danh
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky dang mai hoi. hieu ((ve cam) or (ve chat)) xuc va hanh ((vai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky dang mai hoi. hieu ((ve cam) OR (ve chat)) xuc va hanh ((vai cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach ky dang mai hoi. hieu ((ve cam) or (ve chat)) xuc va hanh ((vai cua) or (dai cua)) tre*.