Perhaps you should try some spelling variations:
nang khoa » hang khoa, dang khoa, nang hoa
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
van hanh » van thanh, ban hanh, van anh
khoa hoc » hoa hoc
te sach » toc sach
cac xuc » chat xuc, cac cuoc, cac quoc
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
cua cau » cua cac, cua chu, cua cay
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 ty nang khoa hoc. hieu ve ((((cac xuc) OR (cam xuc))) or (cac nuoc)) van hanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang khoa hoc. hieu ve ((((cac xuc) OR (cam xuc))) OR (cac nuoc)) van hanh vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang khoa hoc. hieu ve ((((cac xuc) OR (cam xuc))) or (cac nuoc)) van hanh vi cua cau*".