Perhaps you should try some spelling variations:
thieu sang » thieu khang, thieu quang, hieu lang
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » dung cong, thong cong, hang cong
tranh vat » trinh vat, tranh va, tranh van
vat nhung » va nhung, vap nhung, vai nhung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sang) or (chieu sang)) - canh tranh vat nhung cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (chieu sang)) - canh tranh vat nhung cong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (chieu sang)) - canh tranh vat nhung cong dan toan tap*.