Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
vang thanh » van thanh, dang thanh, tang thanh
hanh dung » thanh dung, anh dung, hanh dong
cong vang » cong lang, cong quang, cong ngang
thanh cau » thanh chau, thanh mau, nhanh cau
anh tang » anh bang, anh nang, anh sang
anh dang » anh dong, anh dung, anh bang
ban cong » bang cong, van cong, phan cong

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