Perhaps you should try some spelling variations:
qua pham » quan pham, quy pham, qua cham
thanh ha » thanh hoa, thanh hai, nhanh ha
duc van » duc tan, duc manh, duc phan
cua tre » cuu tre, cua triet, dua tren
su xac » pu xac, su cac
xac ky » cac ky, sac ky, bac ky
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su xac ky nang x hoi. hieu qua pham ((duc van) OR (duc va)) thanh ha ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky nang x hoi. hieu qua pham ((duc van) OR (duc va)) thanh ha ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ky nang x hoi. hieu qua pham ((duc van) OR (duc va)) thanh ha ((cua tre) or (cua te))*".