Perhaps you should try some spelling variations:
tinh vai » tinh va, tinh hai, tinh bai
ky sang » ky dang, ky tang, duy sang
lai hoi » lai hoa, lai roi, mai hoi
dai hoi » dai hoc, dai hai, dai moi
hieu su » hieu sau, tieu su, hieu so
su chao » su cao, sau chan
va tinh » may tinh
vai cua » dai cua, hai cua, lai cua
cua tu » cua tuc, cua su, cua cu
xu va » xu van, tu va, su va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ((ky sang) or (ky nang)) ((lai hoi) OR (dai hoi)). hieu su chao xu va tinh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ((ky sang) OR (ky nang)) ((lai hoi) OR (dai hoi)). hieu su chao xu va tinh vai cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ((ky sang) or (ky nang)) ((lai hoi) OR (dai hoi)). hieu su chao xu va tinh vai cua tu*".