Perhaps you should try some spelling variations:
hien sach » dien sach, kien sach, thien hach
bieu hien » dieu hien, dieu khien, bien phien
sach duoc » sach nuoc, sach dao, sach dung
trinh van » trinh han, trinh quan, trinh toan
va trinh » van trinh, va tinh, lap trinh
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
duoc va » nuoc va, duc va, duoc ma
van huu » van huy, van hau, san huu
huu tri » huu tai

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