Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hoi hoi » hoi hoc, hoc hoi, hoi doi
hieu ve » hieu va, hieu van
ho hoi » hoc hoi, hoa hoi, co hoi
xac ky » cac ky, sac ky, bac ky
ve cam » ve cham, ve cac, va cam
anh de » hanh de, anh d, anh ve
su xac » pu xac, su cac
de su » den su, ve su, de tu

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 ((ho hoi) or (hoi hoi)). hieu ve cam ((tu van) OR (tu va)) anh de su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky nang ((ho hoi) OR (hoi hoi)). hieu ve cam ((tu van) OR (tu va)) anh de su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ky nang ((ho hoi) or (hoi hoi)). hieu ve cam ((tu van) OR (tu va)) anh de su triet*".