Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
trang xa » trang va, trang ha, trang tai
trong xa » trong xay, trong ca, trong xu
thai cua » than cua, tai cuc, tri cua
sai kho » dai kho, tai khoa, dai khoa
hieu va » lieu va, hieu qua
duc van » duc tan, duc manh, duc phan
su sai » su tai, su hai, su dai
va cao » va cac, va co, va dao
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 kho ((trang xa) OR (trong xa)) hoi. hieu va cao ((duc van) or (duc va)) hanh thai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai kho ((trang xa) OR (trong xa)) hoi. hieu va cao ((duc van) OR (duc va)) hanh thai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai kho ((trang xa) OR (trong xa)) hoi. hieu va cao ((duc van) or (duc va)) hanh thai cua te".
• Adding a wildcard symbol may retrieve word variants: su sai kho ((trang xa) OR (trong xa)) hoi. hieu va cao ((duc van) or (duc va)) hanh thai cua te*.