Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
nang dai » nang dau, nang tai, lang dai
dai hoa » dai khoa, dai hoc, dai hoi
hieu ve » hieu va, hieu van
su xac » pu xac, su cac
ve cam » ve cham, ve cac, va cam
xac ky » cac ky, sac ky, bac ky
luc va » tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su xac ky nang dai hoa. hieu ve cam ((luc va) or (duc va)) thanh toan ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky nang dai hoa. hieu ve cam ((luc va) OR (duc va)) thanh toan ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ky nang dai hoa. hieu ve cam ((luc va) or (duc va)) thanh toan ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: su xac ky nang dai hoa. hieu ve cam ((luc va) or (duc va)) thanh toan ((cua triet) OR (va triet))*.