Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh tri » thanh tri, hanh tai, hanh trinh
nang xa » nang x, lang xa, nang ma
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
dai ky » dai ly, sai ky
dan ky » van ky
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((((dai ky) or (dan ky))) or (sac ky)) nang xa hoi. lieu va cam duc van hanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((((dai ky) OR (dan ky))) OR (sac ky)) nang xa hoi. lieu va cam duc van hanh tri cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((((dai ky) or (dan ky))) or (sac ky)) nang xa hoi. lieu va cam duc van hanh tri cua tre*.