Perhaps you should try some spelling variations:
hieu su » hieu sau, tieu su, hieu so
te sach » toc sach
ky sang » ky nang, ky dang, ky tang
lai hoi » lai hoa, lai roi, mai hoi
va hanh » van hanh, va thanh, va danh
su chao » su cao, sau chan
dai hoi » dai hoc, dai hai, dai moi
tu sac » tu sach, tu cac, tu san
vi cua » vai cua, di cua
cua te » cua tu
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 sac) or (te sach)) ky sang ((lai hoi) OR (dai hoi)). hieu su chao xu va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (te sach)) ky sang ((lai hoi) OR (dai hoi)). hieu su chao xu va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) or (te sach)) ky sang ((lai hoi) OR (dai hoi)). hieu su chao xu va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (te sach)) ky sang ((lai hoi) OR (dai hoi)). hieu su chao xu va hanh vi cua te*.