Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong dong, truong cong
hanh truong » hanh trong, anh truong, manh truong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
truong cao » truong dai
thuong con » thuong dong, truong cong, thong cong
tac phan » tac pham, tai phan, cac phan
tac phat » tac pham, tam phat, tan phat

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - hanh truong cao ((thuong cong) or (thuong con)) ((tac phan) OR (tac phat)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh truong cao ((thuong cong) OR (thuong con)) ((tac phan) OR (tac phat)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh truong cao ((thuong cong) or (thuong con)) ((tac phan) OR (tac phat)) tap".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh truong cao ((thuong cong) or (thuong con)) ((tac phan) OR (tac phat)) tap*.