Perhaps you should try some spelling variations:
bieu hien » dieu hien, dieu khien, bien phien
hien sach » dien sach, kien sach, thien hach
sach luan » sach luyen, sach han, san luan
cau tren » cu tren, dau tren, ca tren
luan va » luan van, luat va
va hanh » van hanh, va thanh, ban hanh
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
vi cau » va cau, ve cau, di cau
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: te sac ky nang x hoi. bieu hien sach luan va hanh vi cau tren~.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang x hoi. bieu hien sach luan va hanh vi cau tren*.