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