Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
sang dai » lang dai, sang mai, hoang dai
sang tai » hang tai, sang tao, tang tai
hieu su » hieu sau, tieu su, hieu so
su chao » su cao, sau chan
cua cu » cua chu, cua cau, cua co
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
cua su » qua su
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 sai ky ((sang dai) OR (sang tai)) hoc. hieu su chao xu va thanh vai ((cua cu) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((sang dai) OR (sang tai)) hoc. hieu su chao xu va thanh vai ((cua cu) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky ((sang dai) OR (sang tai)) hoc. hieu su chao xu va thanh vai ((cua cu) or (cua su))".
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((sang dai) OR (sang tai)) hoc. hieu su chao xu va thanh vai ((cua cu) or (cua su))*.