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