Perhaps you should try some spelling variations:
cong hoa » dong hoa, dong hoc, hang hoa
thanh va » thanh van, thanh ha, thanh ve
thuc van » thuc vat, thuc dan, thuc va
so sach » so sanh, bo sach, co sach
hanh va » hang va, hanh vi
xuc van » duc van, luc van, vuc van
sach ky » sac ky, sach y, sach ty
tu cham » toc cham, thi cham
hien tu » khien tu, dien tu
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky cong » ke cong, ly cong, khu cong
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky cong hoa hoi. hien tu cham ((xuc van) or (thuc van)) ((thanh va) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky cong hoa hoi. hien tu cham ((xuc van) OR (thuc van)) ((thanh va) OR (hanh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ky cong hoa hoi. hien tu cham ((xuc van) or (thuc van)) ((thanh va) or (hanh va)) cua tre*.