Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trinh » canh tranh, hanh chinh
trinh hang » trinh han, tranh hang, trinh hanh
hieu lang » chieu sang, hieu quang, nhieu tang
trinh vat » trinh van, trinh luat, sinh vat
vat nhung » va nhung, vap nhung, vai nhung
hang dau » hang va, hang tai
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh trinh vat nhung cong trinh hang dau~.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh trinh vat nhung cong trinh hang dau*.