Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trinh » canh tranh, hanh chinh
trinh qua » trinh quan, trinh cua, trinh quang
qua trong » quan trong, qua trinh, qua song
doan van » doan va, hoang van, tran van
luan » quan, lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) or (thieu khang)) - hanh trinh qua trong cong ((doan van) or (luan van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (thieu khang)) - hanh trinh qua trong cong ((doan van) OR (luan van)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (thieu khang)) - hanh trinh qua trong cong ((doan van) or (luan van)) ban*.