Perhaps you should try some spelling variations:
bieu hien » dieu hien, dieu khien, bien phien
hien sach » dien sach, kien sach, thien hach
sach duoc » sach nuoc, sach dao, sach dung
va trinh » van trinh, va tinh, lap trinh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
duoc va » nuoc va, duc va, duoc ma
van huu » van hau, san huu, van hue
van huy » van duy, van hung

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. bieu hien sach duoc va trinh ((van huu) OR (van huy)) tri~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. bieu hien sach duoc va trinh ((van huu) OR (van huy)) tri".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. bieu hien sach duoc va trinh ((van huu) OR (van huy)) tri*.