Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
thanh mang » thanh hang, hanh mang, nhanh mang
vang thong » mang thong, vang thung, vang trong
cong vang » cong lang, cong quang, cong ngang
thong cau » thong cac, thong cap, thong tu
ho chieu » hoc thieu, doi chieu, mot chieu
cua tong » cua dong, cua nong, cua song

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) or (ho chieu)) sach - thanh mang ((cua tong) OR (cua cong)) cong vang thong cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) sach - thanh mang ((cua tong) OR (cua cong)) cong vang thong cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (ho chieu)) sach - thanh mang ((cua tong) OR (cua cong)) cong vang thong cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (ho chieu)) sach - thanh mang ((cua tong) OR (cua cong)) cong vang thong cau*.