Perhaps you should try some spelling variations:
tay lang » tai lang, tay quang, tham lang
dao thai » dao thi, do thai, da thai
tay tang » tay trung, tay quang, tay tieng
tu sach » thu sach, su sach, te sach
dao hai » dai hai, do hai, dao bai
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
dam tu » nam tu, cam tu, tam tu
va dam » van dam, va dao, va dau

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 ((tay lang) or (tay tang)) xa hoi. hieu va dam tu va ((dao hai) OR (dao thai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tay lang) OR (tay tang)) xa hoi. hieu va dam tu va ((dao hai) OR (dao thai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tay lang) or (tay tang)) xa hoi. hieu va dam tu va ((dao hai) OR (dao thai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((tay lang) or (tay tang)) xa hoi. hieu va dam tu va ((dao hai) OR (dao thai)) cua tre*.