Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
thanh hoi » thanh hoai, thanh hoa, thanh hai
cua triet » cua viet, su triet, va triet
nang xa » lang xa, nang ma, mang xa
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cuu tre, dua tren
tu sai » tu bai, tu san, tu cai
sai ky » sac 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 sai ky ((nang xa) OR (nang x)) hoi. hieu va cam duc tan thanh hoi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((nang xa) OR (nang x)) hoi. hieu va cam duc tan thanh hoi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky ((nang xa) OR (nang x)) hoi. hieu va cam duc tan thanh hoi ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((nang xa) OR (nang x)) hoi. hieu va cam duc tan thanh hoi ((cua tre) or (cua triet))*.