Perhaps you should try some spelling variations:
tang hanh » tang thanh, dang hanh, nang hanh
thu hanh » thuc hanh, thu thanh, thuy hanh
su triet » su viet, su tien, ve triet
duc tang » duc thang, duc tan, tuc tang
cham duc » pham duc, cham soc, pham duy
va triet » va thiet, va trien, ve triet
lang van » dang van, tang van, hoang van
hanh ky » hanh kem
vu cham » va cham, vu kham, tu cham
lang xa » lang ha, dang xay
hieu vu » hieu va, hieu ve, hieu su

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu hanh ky ((lang xa) or (lang van)) hoi. hieu vu cham duc tang hanh vi ((su triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu hanh ky ((lang xa) OR (lang van)) hoi. hieu vu cham duc tang hanh vi ((su triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: thu hanh ky ((lang xa) or (lang van)) hoi. hieu vu cham duc tang hanh vi ((su triet) or (va triet))*.