Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cam thuc » am thuc, nam thuc, cam thu
vat anh » van anh, sat anh, dat anh
hieu ve » hieu va, hieu van
hoi hoi » hoi hoc, hoc hoi, hoi doi
hoa doi » hoa dai, hoc doi, xoa doi
hoa hoi » khoa hoi, hoa hoc, hoc hoi
xac ky » cac ky, sac ky, bac ky
ve cam » ve cham, ve cac, va cam
anh ta » anh tu, anh va, anh tuan
ta cua » ta chua, ca cua, ma cua
su xac » pu xac, su cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky nang ((((hoa hoi) OR (hoa doi))) OR (hoi hoi)). hieu ve cam thuc vat anh ta cua triet~.
• Adding a wildcard symbol may retrieve word variants: su xac ky nang ((((hoa hoi) or (hoa doi))) or (hoi hoi)). hieu ve cam thuc vat anh ta cua triet*.