Perhaps you should try some spelling variations:
hoc nhanh » hoc nganh, hoc phan
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
te sach » toc sach
hoa hoi » khoa hoi, hoa hoc, hoa doi
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ky tang » ky nang, ky dang, kho tang
ha hoi » ha noi, xa hoi, va hoi
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: ((te sach) or (hoc nhanh)) ky tang ((ha hoi) or (hoa hoi)). hieu ve cac nuoc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc nhanh)) ky tang ((ha hoi) OR (hoa hoi)). hieu ve cac nuoc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc nhanh)) ky tang ((ha hoi) or (hoa hoi)). hieu ve cac nuoc va hanh vi cua tre*.