Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
trinh han » trinh quan
dang cong » dung cong
vang toan » van toan, dang toan, quang toan
ho chieu » hoc thieu, doi chieu, mot chieu
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: ((ho chieu) OR (theo chieu)) sach - hanh trinh han ((nhung cong) or (dang cong)) vang toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) sach - hanh trinh han ((nhung cong) OR (dang cong)) vang toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (theo chieu)) sach - hanh trinh han ((nhung cong) or (dang cong)) vang toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (theo chieu)) sach - hanh trinh han ((nhung cong) or (dang cong)) vang toan cao*.