Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
duc van » duc va, duc tan, duc manh
cuu tre » cua tre, cau tren
y nang » ky nang, ly nang, v nang
va cau » van cau, va cac, va dau
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang xa hoi. lieu va cau ((duc van) or (tuc va)) hanh vi ((cuu tre) OR (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang xa hoi. lieu va cau ((duc van) OR (tuc va)) hanh vi ((cuu tre) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang xa hoi. lieu va cau ((duc van) or (tuc va)) hanh vi ((cuu tre) OR (cau treo))".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang xa hoi. lieu va cau ((duc van) or (tuc va)) hanh vi ((cuu tre) OR (cau treo))*.