Perhaps you should try some spelling variations:
duoc cach » cuoc cach, duoc cac, truoc cach
vat thanh » dat thanh, gat thanh, tat thanh
vien cac » vien bach, vien dai, vien da
thanh va » thanh van, hanh va, thanh ha
cach ty » cach tu, cach ta, sach ty
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo
va cuu » va cau, va chu, va huu
x hoi » o hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: duoc cach ty nang ((x hoi) OR (xa hoi)). hieu ((vien cac) or (va cac)) thuc vat thanh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: duoc cach ty nang ((x hoi) OR (xa hoi)). hieu ((vien cac) OR (va cac)) thuc vat thanh va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "duoc cach ty nang ((x hoi) OR (xa hoi)). hieu ((vien cac) or (va cac)) thuc vat thanh va cuu tre".
• Adding a wildcard symbol may retrieve word variants: duoc cach ty nang ((x hoi) OR (xa hoi)). hieu ((vien cac) or (va cac)) thuc vat thanh va cuu tre*.