Perhaps you should try some spelling variations:
danh doi » danh di, thanh doi, dung doi
cham duc » pham duc, pham duy, phan duc
te sang » te bang, te hang, te san
doi cua » dai cua, hoi cua
va danh » va dinh, va dan, va hanh
hieu ve » hieu va, hieu van
may hoi » may thoi, tay hoi, mai hoi
ky dang » ky nang, ky danh
ky mang » ky nang, ke mang, ky tang
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sang ((ky mang) or (ky dang)) may hoi. hieu ve ((cham duc) OR (cham soc)) va danh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sang ((ky mang) OR (ky dang)) may hoi. hieu ve ((cham duc) OR (cham soc)) va danh doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sang ((ky mang) or (ky dang)) may hoi. hieu ve ((cham duc) OR (cham soc)) va danh doi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sang ((ky mang) or (ky dang)) may hoi. hieu ve ((cham duc) OR (cham soc)) va danh doi cua tre*.