Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
mang xa » lang xa, mang may, dang xay
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam
cua tu » cua tuc, cua su, cua te
cua cu » cua chu, cua cau, cua su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky ((mang xa) or (nang x)) hoi. hieu ve cam xuc van hanh vi ((cua tu) or (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((mang xa) OR (nang x)) hoi. hieu ve cam xuc van hanh vi ((cua tu) OR (cua cu)).
• Adding a wildcard symbol may retrieve word variants: te sac ky ((mang xa) or (nang x)) hoi. hieu ve cam xuc van hanh vi ((cua tu) or (cua cu))*.