Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
tinh hai » tinh thai, tinh chat, trinh han
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
hai cua » thai cua, dai cua, hoi cua
va tinh » may tinh
lam xuc » cam xuc, lam duoc
nang xa » lang xa, nang ma, mang xa
xac ky » cac ky, sac ky, bac ky
su xac » pu xac, su cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su xac ky ((nang xa) or (nang x)) hoi. hieu van ((lam xuc) or (lam thuoc)) va tinh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky ((nang xa) OR (nang x)) hoi. hieu van ((lam xuc) OR (lam thuoc)) va tinh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: su xac ky ((nang xa) or (nang x)) hoi. hieu van ((lam xuc) or (lam thuoc)) va tinh hai cua tre*.