Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
cam duc » cam xuc, cao duc, pham duc
dang xa » dang xay, lang xa, dang va
cua tre » cuu tre, cua triet, dua tren
dang ha » dong ha, dung ha, lang ha
van cam » van nam, van lam, van cau
su sai » su tai, su hai, su dai
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 (dang ha)) hoi. hieu van cam duc va thanh vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky ((dang xa) OR (dang ha)) hoi. hieu van cam duc va thanh vi ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ky ((dang xa) OR (dang ha)) hoi. hieu van cam duc va thanh vi ((cua tre) or (cua te))*".