Perhaps you should try some spelling variations:
hieu vien » hieu viec, thieu nien, hieu tieng
hieu hien » bieu hien, dieu hien, chieu chien
lanh tai » hanh tai, lanh hai, anh tai
tu sach » thu sach, su sach, te sach
va lanh » va lang, va danh, va hanh
cuc tre » duc tre, cua tre, cuu tre
da tao » dao tao, de tao, da bao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (vu bach)) ky nang x hoi. ((hieu vien) or (hieu hien)) da tao va lanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (vu bach)) ky nang x hoi. ((hieu vien) OR (hieu hien)) da tao va lanh tai cuc tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu bach)) ky nang x hoi. ((hieu vien) or (hieu hien)) da tao va lanh tai cuc tre*.