Perhaps you should try some spelling variations:
xac danh » xac dinh, tac danh, sach danh
danh sai » dung sai, danh bat, danh dau
nang ma » tang ma, nang cao
sang ma » tang ma, sang tao, sang tai
hieu he » hieu ve, hiem he, hieu le
thu xac » thau xay
sai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
he nam » ha nam, nghe nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky ((((nang ma) or (mang may))) or (sang ma)) hoa. hieu he nam thu xac danh sai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((((nang ma) OR (mang may))) OR (sang ma)) hoa. hieu he nam thu xac danh sai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky ((((nang ma) or (mang may))) or (sang ma)) hoa. hieu he nam thu xac danh sai cua tre*.