Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
thong cong » tong cong, thong thong, phong chong
trinh van » trinh han, trinh quan, trinh toan
van thanh » ban thanh, van tuan
thanh tap » thanh lap, thanh tai, thanh tay

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: hoc ((thieu khang) OR (chieu sach)) - hanh trinh van ((thong cong) OR (trong cong)) van thanh tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu khang) or (chieu sach)) - hanh trinh van ((thong cong) OR (trong cong)) van thanh tap~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu khang) or (chieu sach)) - hanh trinh van ((thong cong) OR (trong cong)) van thanh tap*.