Perhaps you should try some spelling variations:
luat quang » luat quan, xuat quang, chat quang
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
luat dung » suat dung, luat chung, thuat dung
doi hieu » doi chieu, doc hieu, doi hien
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - hanh trinh ((luat dung) OR (luat quang)) cong tac toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi hieu lang - hanh trinh ((luat dung) OR (luat quang)) cong tac toan tap".
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - hanh trinh ((luat dung) OR (luat quang)) cong tac toan tap*.