Perhaps you should try some spelling variations:
hanh than » hanh han, hanh nhan, hanh phan
than cua » nhan cua, thai cua, ban cua
van hanh » van thanh, ban hanh, van anh
cac duc » cac du, cao duc, cac dac
dang xa » dang xay, lang xa, dang ha
dung ha » dung va, dung he, dung khoa
duc van » duc va, duc tan, duc manh
hieu ve » hieu va, hieu van
su sai » su tai, su hai, su dai
ve cac » va cac, vien cac
sai ky » sac ky
cua te » cua 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 sai ky ((dang xa) or (dung ha)) hoi. hieu ve cac duc van hanh than cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky ((dang xa) OR (dung ha)) hoi. hieu ve cac duc van hanh than cua te.
• Adding a wildcard symbol may retrieve word variants: su sai ky ((dang xa) or (dung ha)) hoi. hieu ve cac duc van hanh than cua te*.