Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tinh doi » trinh doc, trinh do, tinh hoc
nhan duc » nhan duoc, nhan luc, phan duc
tinh di » trinh di, tinh da, tin di
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
te sach » toc sach
va nhan » van nhan, ca nhan, va phan

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) or (te sach)) ky dang xa hoi. hieu va nhan duc va ((tinh di) OR (tinh doi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (te sach)) ky dang xa hoi. hieu va nhan duc va ((tinh di) OR (tinh doi)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (te sach)) ky dang xa hoi. hieu va nhan duc va ((tinh di) OR (tinh doi)) cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (te sach)) ky dang xa hoi. hieu va nhan duc va ((tinh di) OR (tinh doi)) cua triet*.