Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hanh trang » thanh trung, canh tranh, hanh trinh
cong quang » luong quang, thong quang, duong quang
quang tran » quang tuan, quang trung, quang thanh
hoc thien » hoc hien, hoc thieu, hoc thiet
va thong » va thuong, va phuong, va cong
tran van » luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien hach - hanh trang ((va thong) or (he thong)) cong quang tran van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - hanh trang ((va thong) OR (he thong)) cong quang tran van.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - hanh trang ((va thong) or (he thong)) cong quang tran van*.