Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
su tien » su kien, tu tieng, dau tien
tan anh » tuan anh, tran anh, toan anh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
su hien » su kien, thu hien, nhu hien
anh vi » hanh vi, anh va, anh ve
v nang » va nang, vu nang, van nang
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho

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 ((v nang) or (cam nang)) x hoi. hieu ve cac duc tan anh vi ((su tien) OR (su hien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((v nang) OR (cam nang)) x hoi. hieu ve cac duc tan anh vi ((su tien) OR (su hien))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ((v nang) or (cam nang)) x hoi. hieu ve cac duc tan anh vi ((su tien) OR (su hien))*".