Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
soc van » hoc van, oc van, sac van
luu tre » cuu tre, luy tre
te cac » tu cac, ve cac, te cao
tru » truc

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cac ky ((nang xa) or (nang ma)) hoi. hieu ve cham soc van hanh vi ((luu tre) or (luu tru))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky ((nang xa) OR (nang ma)) hoi. hieu ve cham soc van hanh vi ((luu tre) OR (luu tru)).
• Adding a wildcard symbol may retrieve word variants: te cac ky ((nang xa) or (nang ma)) hoi. hieu ve cham soc van hanh vi ((luu tre) or (luu tru))*.