Perhaps you should try some spelling variations:
tai lang » thi lan, tai san, va lang
manh hai » lanh hai, minh hai, thanh hai
tu sach » thu sach, su sach, te sach
va manh » van manh, va danh, va hanh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
ve cai » va cai, ve cac, ve tai
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va

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