Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thieu tang » nhieu tang, thieu quang, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
thanh cac » hanh cac, thanh ca, tranh cac
thanh bac » nhanh bac, thanh bai, thanh san
trang va » tran van, hang va
cong ban » cong bang, cong san, cong tan

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 tang) OR (thieu khang)) - hanh trang va nhung cong ban ((thanh cac) or (thanh bac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tang) OR (thieu khang)) - hanh trang va nhung cong ban ((thanh cac) OR (thanh bac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu tang) OR (thieu khang)) - hanh trang va nhung cong ban ((thanh cac) or (thanh bac))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tang) OR (thieu khang)) - hanh trang va nhung cong ban ((thanh cac) or (thanh bac))*.