Perhaps you should try some spelling variations:
thanh cha » thanh ha, thanh nha, thanh phan
cham duc » pham duc, cham soc, pham duy
thanh ca » thanh cac, thanh ha, thanh va
so sach » so sanh, bo sach, co sach
duc van » duc va, duc tan, duc manh
tu cham » toc cham, thi cham
hien tu » khien tu, dien tu
hoa hoi » khoa hoi, hoa hoc, hoa doi
ly dong » ly dung, lao dong, huy dong
ky dong » ky dang, ky cong, ty dong
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: so sach ((ky dong) OR (ly dong)) hoa hoi. hien tu cham duc van ((thanh ca) or (thanh cha)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ky dong) OR (ly dong)) hoa hoi. hien tu cham duc van ((thanh ca) OR (thanh cha)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ky dong) OR (ly dong)) hoa hoi. hien tu cham duc van ((thanh ca) or (thanh cha)) cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ((ky dong) OR (ly dong)) hoa hoi. hien tu cham duc van ((thanh ca) or (thanh cha)) cua te*.