Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh quan
doi chieu » doc hieu, doi chi, mot chieu
nhan lang » nhanh lang, nhan dang, nhon lang
cong cong » cong dong, trong cong, dung cong
trinh han » trinh quan
ho chieu » theo chieu, hoc thieu, mot chieu
lang cua » mang cua, hang cua, long cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (doi chieu)) sach - nhan lang cua cong cong ((trinh toan) or (trinh han)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - nhan lang cua cong cong ((trinh toan) OR (trinh han)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) sach - nhan lang cua cong cong ((trinh toan) or (trinh han)) cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) sach - nhan lang cua cong cong ((trinh toan) or (trinh han)) cau*.