Perhaps you should try some spelling variations:
hieu duoc » hiem duoc, hieu thuoc, bien duoc
hieu luc » hieu luat, hieu qua
chat xuc » chat huu, cam xuc, chao xu
viet qua » vien quan, ket qua, viet ha
tu cach » tu cac
xuc van » duc van, luc van, vuc van
van anh » van thanh, tuan anh, van minh
qua tre » cua tre, quan tren, quan tri

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (do sanh)) ky nang x ho. ((hieu duoc) OR (hieu luc)) chat xuc van anh viet qua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (do sanh)) ky nang x ho. ((hieu duoc) OR (hieu luc)) chat xuc van anh viet qua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (do sanh)) ky nang x ho. ((hieu duoc) OR (hieu luc)) chat xuc van anh viet qua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (do sanh)) ky nang x ho. ((hieu duoc) OR (hieu luc)) chat xuc van anh viet qua tre*.