Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
ly nang » ky nang, ly hang, ly vang
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
tuc va » thuc va, truc va, duc va
x hoi » xa hoi, o hoi, x ho
bach » sach, cach, bac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach ly nang x hoi. hieu ve cac ((tuc va) or (tuc xa)) hanh vi ((cua tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ly nang x hoi. hieu ve cac ((tuc va) OR (tuc xa)) hanh vi ((cua tre) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: vu bach ly nang x hoi. hieu ve cac ((tuc va) or (tuc xa)) hanh vi ((cua tre) or (cau treo))*.