Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
lanh hai » manh hai, thanh hai, lang chai
chat lua » chat cua, chat va, chat huu
hieu ve » hieu va, hieu van
hai cua » thai cua, dai cua, hoi cua
va lanh » va lang, va danh, va hanh
ve chat » va chat, van chat
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang
lua va » luan va, luat va, vua va

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 (toc sach)) ((ky nang) or (v nang)) xa hoi. hieu ve chat lua va lanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ((ky nang) OR (v nang)) xa hoi. hieu ve chat lua va lanh hai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ((ky nang) or (v nang)) xa hoi. hieu ve chat lua va lanh hai cua tre*".