Perhaps you should try some spelling variations:
chat duc » chat xuc, chat doc, chet duoc
viet cua » viec cua, viet ca, viet qua
tu cach » tu cac
so sach » so sanh, bo sach, co sach
hieu du » hien du, hiem du, hieu qua
hieu su » hieu sau, tieu su, hieu so
duc van » duc va, duc tan, duc manh
van anh » van thanh, tuan anh, van minh
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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 (so sach)) ky nang x hoi. ((hieu du) or (hieu su)) chat duc van anh viet cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (so sach)) ky nang x hoi. ((hieu du) OR (hieu su)) chat duc van anh viet cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (so sach)) ky nang x hoi. ((hieu du) or (hieu su)) chat duc van anh viet cua tre*.