Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
cau treo » cau theo, cau tren, cau triet
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
hanh va » hang va, hanh vi
te sach » toc sach
ty nang » ky nang, ty xang, ty hang
ve cac » vien cac
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu ((ve cac) or (va cac)) suc manh hanh va ((cua tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang x hoi. hieu ((ve cac) OR (va cac)) suc manh hanh va ((cua tre) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: te sach ty nang x hoi. hieu ((ve cac) or (va cac)) suc manh hanh va ((cua tre) or (cau treo))*.