Perhaps you should try some spelling variations:
ngan khoa » nganh khoa, nhan khoa, nhuan khoa
khoa hoc » hoa hoc
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu ngan » vu ngan, tu ngay, te ngan
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc manh, duc phan
cua cay » cua cac
vi cua » vai cua, di cua

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 tu ngan khoa hoc. hieu van cham ((xuc van) or (((duc van) OR (duc tan)))) hanh vi cua cay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu ngan khoa hoc. hieu van cham ((xuc van) OR (((duc van) OR (duc tan)))) hanh vi cua cay*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu ngan khoa hoc. hieu van cham ((xuc van) or (((duc van) OR (duc tan)))) hanh vi cua cay*".