Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
cham duc » pham duc, pham duy, phan duc
te sach » toc sach
tai cuu » tai cuc, tai buu, tai cua
va hanh » van hanh, va thanh, va danh
tu nano » truc nano
tu nang » tru nang, tu nong, tu lang
cuu tre » cua tre, cau tren, cau treo

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 ((tu nang) or (tu nano)) xa hoi. lieu va ((cham duc) OR (cham soc)) va hanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu nang) OR (tu nano)) xa hoi. lieu va ((cham duc) OR (cham soc)) va hanh tai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu nang) or (tu nano)) xa hoi. lieu va ((cham duc) OR (cham soc)) va hanh tai cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu nang) or (tu nano)) xa hoi. lieu va ((cham duc) OR (cham soc)) va hanh tai cuu tre*.