Perhaps you should try some spelling variations:
thanh sinh » thanh binh, thanh tinh, thanh vinh
sinh cua » manh cua, dinh cuu, sinh va
thu sach » thuat sach, thuoc sach, thu hoach
ha thanh » va thanh, pham thanh, phan thanh
tu sach » su sach, te sach, tu cach
quan ha » quan he
cua tre » cua te, cuu tre, cua triet
nang co » nang cao, nang doc, nang noi
va nay » va ngay, va cay
co hoi » co hoc, co loi
y nang » ky nang, ly nang, v nang
va nam » van nam, ha nam

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 (thu sach)) y nang co hoi. lieu ((va nam) or (va nay)) quan ha thanh sinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang co hoi. lieu ((va nam) OR (va nay)) quan ha thanh sinh cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) y nang co hoi. lieu ((va nam) or (va nay)) quan ha thanh sinh cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) y nang co hoi. lieu ((va nam) or (va nay)) quan ha thanh sinh cua tre*.