Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
thanh hai » thanh phan, thanh hoa, thanh san
trung ha » trung hoc, trung tam, trung cap
cua tre » cuu tre, cua triet, dua tren
tang ma » mang may, tang van
v pham » vi pham, d pham
su sac » su sach, su cac, su xac
hieu v » hieu va, hieu ve, hieu 2
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky ((trung ha) or (tang ma)) hoi. hieu v pham duc tan thanh hai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((trung ha) OR (tang ma)) hoi. hieu v pham duc tan thanh hai ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su sac ky ((trung ha) or (tang ma)) hoi. hieu v pham duc tan thanh hai ((cua tre) or (cua te))*.