Perhaps you should try some spelling variations:
sut triet » su triet, suat thiet, cua triet
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
tu sach » thu sach, su sach, vu sach
tu cach » tu cac
te sach » toc sach
va tinh » may tinh
tinh do » trinh do, tinh doi, tinh da
x hoi » xa hoi, o hoi, x ho

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 (tu cach))) or (te sach)) ky nang x hoi. hieu van pham duc va tinh do sut triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (tu cach))) OR (te sach)) ky nang x hoi. hieu van pham duc va tinh do sut triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((tu sach) OR (tu cach))) or (te sach)) ky nang x hoi. hieu van pham duc va tinh do sut triet*".