Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh trang » thanh trung, canh tranh, minh trang
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
luan han » luan hoan, luan phan, luan van
han nong » hang nong, han tong, phan cong
nong tan » cong tan, nong dan, nong san
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - ((hanh trang) or (hanh trinh)) luan han nong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - ((hanh trang) OR (hanh trinh)) luan han nong tan toan cao.
• Adding a wildcard symbol may retrieve word variants: theo chu sach - ((hanh trang) or (hanh trinh)) luan han nong tan toan cao*.