Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
dang xay » dang van, van xay
trinh te » trinh tu, trinh he, trinh ke
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
xuc may » truc may, phuc may
ve cam » ve cham, ve cac, va cam

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 dang xay hoi. hieu ve cam ((xuc may) or (xuc hay)) trinh te ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang xay hoi. hieu ve cam ((xuc may) OR (xuc hay)) trinh te ((cua triet) OR (cua viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang xay hoi. hieu ve cam ((xuc may) or (xuc hay)) trinh te ((cua triet) OR (cua viet))*".