Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
ve triet » va trien, su triet
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
cau luc » cau truc, cau phuc
cac luc » coc luc, cac nuoc, cac cuoc
ky dang » ky danh
doi ve » moi ve, doi va, noi ve
su sai » su tai, su hai, su dai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ((ky dang) or (ky nang)) xa hoi. hieu van ((cac luc) OR (cau luc)) va thanh doi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ((ky dang) OR (ky nang)) xa hoi. hieu van ((cac luc) OR (cau luc)) va thanh doi ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ((ky dang) or (ky nang)) xa hoi. hieu van ((cac luc) OR (cau luc)) va thanh doi ve triet".
• Adding a wildcard symbol may retrieve word variants: su sai ((ky dang) or (ky nang)) xa hoi. hieu van ((cac luc) OR (cau luc)) va thanh doi ve triet*.