Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » dung cong, thong cong, hang cong
hanh tang » hanh trang, hanh mang, nhanh thang
hanh tung » thanh tung, manh tung, hanh dung
cua nhung » va nhung
trinh van » trinh han, trinh quan, trinh toan
anh tang » anh bang, anh dang, anh nang

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 sang - ((((hanh tang) or (hanh tung))) or (anh tang)) cua nhung cong trinh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sang - ((((hanh tang) OR (hanh tung))) OR (anh tang)) cua nhung cong trinh van ban.
• Adding a wildcard symbol may retrieve word variants: theo chieu sang - ((((hanh tang) or (hanh tung))) or (anh tang)) cua nhung cong trinh van ban*.