Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chieu sang » chieu sach, chieu xanh, nhieu tang
luat quang » luat quan, xuat quang, chat quang
hieu lang » hieu quang, nhieu tang, hieu van
luat dung » suat dung, luat chung, thuat dung
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (chieu sang)) - 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) or (chieu sang)) - hanh trinh ((luat dung) OR (luat quang)) cong tac toan tap~".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (chieu sang)) - hanh trinh ((luat dung) OR (luat quang)) cong tac toan tap*.