Perhaps you should try some spelling variations:
vien chao » vien cao, vien cheo, vien cho
hieu vien » hieu hien, hieu viec, thieu nien
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
cua tre » cuu tre, cua triet, dua tren
ma hoi » mai hoi, ma hoa, me hoi
xu van » tu van, vu van, su van
cua te » cua tu

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 nang ((ma hoi) or (xa hoi)). hieu vien chao xu van hanh lai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ((ma hoi) OR (xa hoi)). hieu vien chao xu van hanh lai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang ((ma hoi) or (xa hoi)). hieu vien chao xu van hanh lai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((ma hoi) or (xa hoi)). hieu vien chao xu van hanh lai ((cua tre) OR (cua te))*.