Perhaps you should try some spelling variations:
thanh hoai » thanh hoa, thanh hai, thanh oai
tang thanh » dang thanh, trung thanh, hoang thanh
su triet » su viet, su tien, ve triet
duc tang » duc thang, duc tan, tuc tang
nang xa » nang x, lang xa, mang xa
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
tu cai » tu cac, tu can, tu bai
cai ky » cao ky, cac ky, cam 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: tu cai ky ((nang xa) or (nang ma)) hoi. hieu va cam duc tang thanh hoai ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cai ky ((nang xa) OR (nang ma)) hoi. hieu va cam duc tang thanh hoai ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu cai ky ((nang xa) or (nang ma)) hoi. hieu va cam duc tang thanh hoai ((cua tre) or (su triet))*.