Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
san hanh » san thanh, ban hanh, van hanh
vien cac » vien bach, vien dai, vien da
sach ty » sach y, sach tu, sach thu
sach ky » sac ky, sach y, sach kem
cac toc » cac toi, cac nuoc, cac thoi
x hoi » xa hoi, o hoi, x ho
ve ve » va ve, ke ve, ve ke

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) OR (sach ty)) nang x hoi. hieu vien cac toc san hanh ((ve ve) or (de ve)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) nang x hoi. hieu vien cac toc san hanh ((ve ve) OR (de ve)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach ty)) nang x hoi. hieu vien cac toc san hanh ((ve ve) or (de ve)) triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach ty)) nang x hoi. hieu vien cac toc san hanh ((ve ve) or (de ve)) triet*.