Perhaps you should try some spelling variations:
quan trong » gian trong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
tinh quan » tinh quang, trinh quan, tin quan
trinh san » trinh han, trinh quan, trinh toan
ho hieu » ho chieu, hoi hieu, nho hieu
san dau » van dau, san diu, ban dau

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 tinh quan trong cong trinh san dau~.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh tinh quan trong cong trinh san dau*.