Perhaps you should try some spelling variations:
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
dang hoai » dang hai, dang loai, dung hoai
van nhanh » van thanh, van hanh, van khanh
hoai hoi » hoa hoi, hoi hoi, ngoai hoi
hieu va » lieu va, hieu qua
cao duc » dao duc, cao suc, giao duc
cua tre » cuu tre, cua triet, dua tren
duc van » duc va, duc tan, duc manh
va cao » va cac, va co, va dao
sac ky » cac 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) or (sac ky)) dang hoai hoi. hieu va cao duc van nhanh thai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sai ky) OR (sac ky)) dang hoai hoi. hieu va cao duc van nhanh thai ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su ((sai ky) or (sac ky)) dang hoai hoi. hieu va cao duc van nhanh thai ((cua tre) or (cua te))*.