Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thieu sang » chieu sang, thieu quang, hieu lang
hanh trang » thanh trung, canh tranh, hanh trinh
cong tran » cong tan, cong tuan, cong toan
tran nhan » tran nhat, tan nhan, tran han
cua dang » cua ban
nhan cau » nhanh cau, phan cau, nhan sau

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 (thieu khang)) - hanh trang ((cua cong) or (cua dang)) cong tran nhan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu khang)) - hanh trang ((cua cong) OR (cua dang)) cong tran nhan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) OR (thieu khang)) - hanh trang ((cua cong) or (cua dang)) cong tran nhan cau*".