Perhaps you should try some spelling variations:
quang trong » quang truong, quang trung, quan trong
nhiet tach » chiet tach
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
hoc nhiet » hoc thiet, hoc nghien, hoc hien
hanh tinh » hanh trinh, thanh tinh, canh tinh
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than ban » thanh ban, toan ban, than man

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc nhiet tach - ((hanh tinh) OR (nhanh tinh)) quang trong cong tac than ban~".
• Adding a wildcard symbol may retrieve word variants: hoc nhiet tach - ((hanh tinh) OR (nhanh tinh)) quang trong cong tac than ban*.