Perhaps you should try some spelling variations:
toan hanh » toan thanh, toan anh, tran hanh
dang xay » dang van, van xay
duc toan » duc tan, duc ton, duc hoan
thu sac » thu sach, thu san, thu xac
hanh va » hang va, hanh vi
su tien » su kien, su hien, tu tieng
sac ky » cac ky, sai 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 sac ky ((dang xay) 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 sac ky ((dang xay) 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 sac ky ((dang xay) or (nang x)) hoi. hieu ((ve cam) or (ve cac)) duc toan hanh va su tien*.