Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doan dau » doan dieu, phan dau, doan va
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, dua tren
te sach » toc sach
sach ky » sac ky, sach y, sach ty
su kham » su pham, vu kham, so kham
hieu su » hieu sau, tieu su, hieu so
nang ma » tang ma, sang ma, nang cao
tuc va » truc va, tuc xa, duc va
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ma hoi. hieu su kham ((tuc va) or (thuc va)) doan dau ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. hieu su kham ((tuc va) OR (thuc va)) doan dau ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoi. hieu su kham ((tuc va) or (thuc va)) doan dau ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. hieu su kham ((tuc va) or (thuc va)) doan dau ((cua tre) OR (cua triet))*.