Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
thanh hoi » thanh hoai, thanh hoa, thanh hai
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, lang xa, nang ma
va cham » va chat, va tham
cua tre » cua te, cuu tre, cua triet
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
va cam » va cac, va cao, va cai

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 hoi. hieu ((va cam) OR (va cham)) duc tan thanh hoi ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang xa hoi. hieu ((va cam) OR (va cham)) duc tan thanh hoi ((cua tre) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky nang xa hoi. hieu ((va cam) OR (va cham)) duc tan thanh hoi ((cua tre) or (cua viet))".
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang xa hoi. hieu ((va cam) OR (va cham)) duc tan thanh hoi ((cua tre) or (cua viet))*.