Perhaps you should try some spelling variations:
hcong trong » huong trong, thuong trong, phuong trong
cong trong » cong thuong, duong trong, cong trinh
doi chieu » doc hieu, doi chi, ho chieu
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
vat dung » van dung, va dung, viet dung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) OR (hoc thieu)) xanh - ((hcong trong) OR (cong trong)) vat dung cong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (hoc thieu)) xanh - ((hcong trong) OR (cong trong)) vat dung cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (hoc thieu)) xanh - ((hcong trong) OR (cong trong)) vat dung cong dan toan cao*.