Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
cau theo » cau thi, cau tao
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
duc van » duc va, duc tan, duc manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) ky nang xa hoi. hieu va cham duc van ((hanh vi) or (hanh kem)) cau theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang xa hoi. hieu va cham duc van ((hanh vi) OR (hanh kem)) cau theo.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang xa hoi. hieu va cham duc van ((hanh vi) or (hanh kem)) cau theo*.