Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
qua pham » quan pham, quy pham, qua cham
thanh ha » thanh hoa, nhanh ha, thanh phan
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
duc van » duc va, duc tan, duc manh
cua tre » cuu tre, cua triet, dua tren
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 sach ty nang x hoi. hieu qua pham duc van ((thanh ha) OR (thanh hai)) ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang x hoi. hieu qua pham duc van ((thanh ha) OR (thanh hai)) ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang x hoi. hieu qua pham duc van ((thanh ha) OR (thanh hai)) ((cua tre) or (cua te))*".