Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
qua cam » qua cham, qua cac, qua ca
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
tai chi » tai chinh
chi tre » choi tre, cho tre, chi tro
sai ky » sac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sai ky) or (sach y)) nang xa hoi. hieu qua cam duc ((va hanh) or (va danh)) tai chi tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sai ky) OR (sach y)) nang xa hoi. hieu qua cam duc ((va hanh) OR (va danh)) tai chi tre.
• Adding a wildcard symbol may retrieve word variants: te ((sai ky) or (sach y)) nang xa hoi. hieu qua cam duc ((va hanh) or (va danh)) tai chi tre*.