Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
theo chieu » theo tieu, ho chieu, theo chu
nhung cong » dung cong, thong cong, hang cong
trinh vat » trinh van, trinh luat, sinh vat
vat nhung » va nhung, vap nhung, vai nhung
van toan » van tan, van thanh, manh toan
van tuan » van quan, van ban, anh tuan
doi chi » doi khi

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 (doi chi)) sach - hanh trinh vat nhung cong ((van toan) or (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (doi chi)) sach - hanh trinh vat nhung cong ((van toan) OR (van tuan)) cau.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (doi chi)) sach - hanh trinh vat nhung cong ((van toan) or (van tuan)) cau*.