Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
cong thanh » dong thanh, cong trinh, truong thanh
hoc thieu » toc thieu, hoc hien
tranh vat » trinh vat, tranh va, tranh van
vat nhung » va nhung, vap nhung, vai nhung
cong tan » cong tac, cong san, cong ty
toan tap » toan ban

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 thieu sang - canh tranh vat nhung ((cong thanh) OR (cong tan)) toan tap~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - canh tranh vat nhung ((cong thanh) OR (cong tan)) toan tap*.