Perhaps you should try some spelling variations:
bieu hien » dieu hien, dieu khien, bien phien
hien sach » dien sach, kien sach, thien hach
sach dao » lanh dao
va trinh » van trinh, lap trinh, qua trinh
te sach » toc sach
va tinh » may tinh
san huu » tran huu, phan huu, san khau
van huu » van huy, van hau, van hue
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma

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. bieu hien sach dao ((va trinh) or (va tinh)) ((van huu) OR (san huu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. bieu hien sach dao ((va trinh) OR (va tinh)) ((van huu) OR (san huu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. bieu hien sach dao ((va trinh) or (va tinh)) ((van huu) OR (san huu)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. bieu hien sach dao ((va trinh) or (va tinh)) ((van huu) OR (san huu)) tre*.