Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
te sach » toc sach
dai cuu » dai cua, dai huu
xa hanh » xa thanh, xa khanh, va hanh
cac tac » cac toc, cac bac, cac dac
cac tuc » cac toc, cac tu, cac nuoc
hieu va » lieu va, hieu qua
ty nang » ky nang, ty hang, ly nang
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 ((ty nang) OR (ty xang)) xa hoi. hieu va ((cac tuc) or (cac tac)) xa hanh dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nang) OR (ty xang)) xa hoi. hieu va ((cac tuc) OR (cac tac)) xa hanh dai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty nang) OR (ty xang)) xa hoi. hieu va ((cac tuc) or (cac tac)) xa hanh dai cuu tre*".