Perhaps you should try some spelling variations:
va thanh » ban thanh, va tinh, le thanh
vinh cuu » dinh cuu, sinh cua, dinh cu
lieu ha » lieu nha, lieu va, liem ha
nam duc » nam duoc, pham duc, nam thuc
cuu tre » cua tre, cau tren, cau treo
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
co hoi » co hoc, co loi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky nang ((cau hoi) or (co hoi)). lieu ha nam duc ((va thanh) OR (gia thanh)) vinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang ((cau hoi) OR (co hoi)). lieu ha nam duc ((va thanh) OR (gia thanh)) vinh cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky nang ((cau hoi) or (co hoi)). lieu ha nam duc ((va thanh) OR (gia thanh)) vinh cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang ((cau hoi) or (co hoi)). lieu ha nam duc ((va thanh) OR (gia thanh)) vinh cuu tre*.