Perhaps you should try some spelling variations:
nang khoa » hang khoa, dang khoa, nang hoa
hoc sach » hoc sinh, hoc anh
van hanh » van thanh, ban hanh, van anh
thu nang » thi nang, thu hang, thu bang
khoa hoc » hoa hoc
xuc van » duc van, luc van, vuc van
hoc cac » hoc cao
cua cau » cua cac, cua chu, cua cay
ve cac » vien 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: ((hoc sach) OR (hoc cac)) thu nang khoa hoc. hieu ((ve cac) or (va cac)) xuc van hanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc cac)) thu nang khoa hoc. hieu ((ve cac) OR (va cac)) xuc van hanh vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc cac)) thu nang khoa hoc. hieu ((ve cac) or (va cac)) xuc van hanh vi cua cau*".