Perhaps you should try some spelling variations:
hien trang » huyen trang, mien trung, bien trong
hien sang » khien bang, chieu sang, thien bang
tranh cua » doanh cua, manh cua
cong bang » cuong bang, dong bang, hong bang
cua hang » cua dang, cua nhung, cua cong
cong ban » cong san, cong tan, cong dan
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien sang) OR (hien trang)) - canh tranh cua hang ((cong ban) or (cong bang)) than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sang) OR (hien trang)) - canh tranh cua hang ((cong ban) OR (cong bang)) than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien sang) OR (hien trang)) - canh tranh cua hang ((cong ban) or (cong bang)) than cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sang) OR (hien trang)) - canh tranh cua hang ((cong ban) or (cong bang)) than cao*.