Perhaps you should try some spelling variations:
thieu nien » thien nhien
cac giai » tac gia, hoc giai, cac bai
lang hai » lang chai, lang thai, lang ha
hai cua » thai cua, dai cua, hoi cua
va lang » va nang, hoa lang
te sach » toc sach
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (su sach)) ky nang xa hoi. thieu nien ((cac giai) OR (cuu giai)) va lang hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (su sach)) ky nang xa hoi. thieu nien ((cac giai) OR (cuu giai)) va lang hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (su sach)) ky nang xa hoi. thieu nien ((cac giai) OR (cuu giai)) va lang hai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (su sach)) ky nang xa hoi. thieu nien ((cac giai) OR (cuu giai)) va lang hai cua tre*.