Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
thanh vung » thanh vuong, thanh tung, thanh hung
nhung cong » dung cong, thong cong, hang cong
vung tay » vung tau, dung tai, vung dat
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap

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