Perhaps you should try some spelling variations:
doan dieu » nhan dieu, toan dien
nang mai » nang ma, nang tai, lang mai
cua tre » cua te, cuu tre, cua triet
mai hoi » mai khoi, dai hoi, lai hoi
hieu so » thieu so
truc va » thuc vat, trung va
thuc va » thuc vat, thuc dan, thuc day
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky

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 mai hoi. hieu so kham ((truc va) or (thuc va)) ((doan dieu) or (dang dieu)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang mai hoi. hieu so kham ((truc va) OR (thuc va)) ((doan dieu) OR (dang dieu)) cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang mai hoi. hieu so kham ((truc va) or (thuc va)) ((doan dieu) or (dang dieu)) cua tre*.