Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
hanh doi » hanh noi, hang doi, hanh moi
su sach » so sach
cham oc » cham soc, cham o, cham hoi
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
vu sach » vu bach, vu khach
cua tre » cua te, cuu tre, cua triet
oc van » hoc van, luoc van, quoc van

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) or (vu sach)) ky nang xa hoi. hieu va cham oc van ((hanh doi) OR (thanh doi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang xa hoi. hieu va cham oc van ((hanh doi) OR (thanh doi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky nang xa hoi. hieu va cham oc van ((hanh doi) OR (thanh doi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang xa hoi. hieu va cham oc van ((hanh doi) OR (thanh doi)) cua tre*.