Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh trinh » canh tranh, hanh chinh
luat dung » suat dung, luat chung, thuat dung
dung cong » dung trong
ho chieu » hoc thieu, doi chieu, mot chieu
tac than » tac thanh, tam than, bac thanh
tac nhan » tao nhan, cac nhan, dac nhan

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)) tinh - hanh trinh luat dung cong ((tac than) or (tac nhan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) tinh - hanh trinh luat dung cong ((tac than) OR (tac nhan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (theo chieu)) tinh - hanh trinh luat dung cong ((tac than) or (tac nhan)) cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (theo chieu)) tinh - hanh trinh luat dung cong ((tac than) or (tac nhan)) cau*.