Perhaps you should try some spelling variations:
dang quang » dung quang, nang quan, dang hung
tinh dang » tinh dung, binh dang, tinh sang
kiem soat » kiem toan
quang van » quang ban, quan van, quang uan
thien tai » thien van, thien tu, vien tai
dung cua » dung luan, dung cho
thien va » thien van, tien va, trien van
va kiem » van kien
cua va » cua vat, chua va, cua van

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tin dung cua va kiem soat ) or ( tinh dang quang van ((thien tai) OR (thien va)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung cua va kiem soat ) OR ( tinh dang quang van ((thien tai) OR (thien va)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tin dung cua va kiem soat ) or ( tinh dang quang van ((thien tai) OR (thien va)) ))".
• Adding a wildcard symbol may retrieve word variants: (( tin dung cua va kiem soat ) or ( tinh dang quang van ((thien tai) OR (thien va)) ))*.