Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
hoc sach » hoc sinh, hoc cac, hoc anh
hoc sac » hoc cac, hoc mac, hoc sau
vai cua » dai cua, hai cua, lai cua
hieu ve » hieu va, hieu van
dang ma » dang mau, dang mam, dang mat
ky dang » ky nang, ky danh
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam
luc va » tuc va, loc va
cua te » cua tu

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) OR (hoc sach)) ky dang ma hoi. hieu ve cam ((duc va) OR (luc va)) thanh vai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sac) OR (hoc sach)) ky dang ma hoi. hieu ve cam ((duc va) or (luc va)) thanh vai cua te~".
• Adding a wildcard symbol may retrieve word variants: ((hoc sac) OR (hoc sach)) ky dang ma hoi. hieu ve cam ((duc va) or (luc va)) thanh vai cua te*.