Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
van dinh » van minh, van dich, va dinh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
dinh vi » dinh ve, dinh viet, dinh tri
cac lo » cac lop, cac bo, cac ho
cac co » cac cong
vi cua » vai cua, di cua
cua te » cua tu

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 ky nang xa hoi. hieu vien ((cac lo) OR (cac co)) van dinh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu vien ((cac lo) OR (cac co)) van dinh vi cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu vien ((cac lo) OR (cac co)) van dinh vi cua te*.