Perhaps you should try some spelling variations:
toan hanh » toan thanh, toan anh, tran hanh
duc toan » duc tan, duc ton, duc hoan
thu san » thuy san, thu ban, phu san
hanh va » hang va, hanh vi
su tien » su kien, su hien, tu tieng
lang xa » lang ha, dang xay, lang van
san ky » sang ky, van ky, dan ky
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu san ky ((lang xa) or (nang x)) hoi. hieu ((ve cam) or (ve cac)) duc toan hanh va su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu san ky ((lang xa) OR (nang x)) hoi. hieu ((ve cam) OR (ve cac)) duc toan hanh va su tien.
• Adding a wildcard symbol may retrieve word variants: thu san ky ((lang xa) or (nang x)) hoi. hieu ((ve cam) or (ve cac)) duc toan hanh va su tien*.