Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
cua tuc » cua duc, cua thuoc, luat tuc
cham oc » cham soc, cham o, cham hoi
tu cham » toc cham, thi cham
hieu tu » chieu tu, hieu tuc, hien tu
dai hoi » dai hoc, dai hai, dai moi
ky sang » ky dang, ky tang, duy sang
oc van » hoc van, luoc van, quoc van
cua tu » cua su, cua cu, cua te
tu sac » tu sach, tu cac, tu san

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 ((ky sang) or (ky nang)) dai hoi. hieu tu cham oc van hanh tai ((cua tu) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky sang) OR (ky nang)) dai hoi. hieu tu cham oc van hanh tai ((cua tu) OR (cua tuc)).
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky sang) or (ky nang)) dai hoi. hieu tu cham oc van hanh tai ((cua tu) or (cua tuc))*.