Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
van hanh » van thanh, van anh, van ban
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
van nhan » van phan, van thanh, danh nhan
nhan luc » nang luc
ban hanh » ban hang
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh

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