Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
van thanh » ban thanh, van tuan
vien cac » vien bach, vien dai, vien da
nang mai » nang ma, nang tai, nang cai
lang mai » lang dai, lang hai, lang man
cua tre » cua te, cuu tre, cua triet
vai cua » dai cua, hai cua, lai cua
duc van » duc va, duc tan, duc manh
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ve cac » va cac

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: su sac ky ((nang mai) OR (lang mai)) hoi. hieu ((ve cac) OR (vien cac)) duc van thanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky ((nang mai) OR (lang mai)) hoi. hieu ((ve cac) or (vien cac)) duc van thanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sac ky ((nang mai) OR (lang mai)) hoi. hieu ((ve cac) or (vien cac)) duc van thanh vai cua tre*.