Perhaps you should try some spelling variations:
sam quan » nam quan, san quan, sau quan
va thanh » gia thanh, ban thanh, le thanh
sinh cua » manh cua, dinh cuu, sinh va
tu sach » thu sach, su sach, te sach
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
va sam » va san, va am, va cam
o hoi » co hoi, o hoc, o hai

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 y nang o hoi. lieu va sam quan ((va thanh) OR (va tinh)) sinh cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang o hoi. lieu va sam quan ((va thanh) OR (va tinh)) sinh cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang o hoi. lieu va sam quan ((va thanh) OR (va tinh)) sinh cua tre*.