Perhaps you should try some spelling variations:
doan vai » doan va, doan van, doan hai
sang tao » hang tai
cua tre » cua te, cuu tre, cua triet
vai cua » dai cua, hai cua, lai cua
va doan » va doanh, van doan, va dan
vu cham » va cham, vu kham, tu cham
ve cham » va cham, ve chat, ve chim
sang ma » tang ma, nang ma, mang may
sai ky » sac ky
tuc va » thuc va, truc va, tuc xa
tu sai » tu bai, tu san, tu cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky ((sang ma) or (sang tao)) hoi. hieu ((ve cham) OR (vu cham)) tuc va doan vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((sang ma) OR (sang tao)) hoi. hieu ((ve cham) OR (vu cham)) tuc va doan vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky ((sang ma) or (sang tao)) hoi. hieu ((ve cham) OR (vu cham)) tuc va doan vai cua tre*".