Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cham duc » pham duc, cham soc, pham duy
cau theo » cau thi, cau tao
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
so sach » so sanh, bo sach, co sach
va binh » van binh, va kinh, va sinh
va tinh » may tinh
hoi cau » hoi chu, hoc cau, hoa cau
ve cham » va cham, ve chat, vu cham

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (so sach)) ky nang xa hoi. hieu ve cham duc ((va binh) OR (va tinh)) hoi cau theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (so sach)) ky nang xa hoi. hieu ve cham duc ((va binh) OR (va tinh)) hoi cau theo*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (so sach)) ky nang xa hoi. hieu ve cham duc ((va binh) OR (va tinh)) hoi cau theo*".