Perhaps you should try some spelling variations:
sach trinh » hanh trinh, sach kinh, sach tren
sach tranh » canh tranh
sach nganh » sach ngan, cac nganh, sach danh
nganh cong » nhanh chong, thanh cong
cong thai » cong hai, hong thai, cong thanh
cong khi » khong khi, co khi, cong ha
tu sach » thu sach, su sach, te sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu ((sach trinh) OR (sach tranh)) cong khi đong luc ) or ( tu sach nganh cong thai đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu ((sach trinh) OR (sach tranh)) cong khi đong luc ) OR ( tu sach nganh cong thai đong luc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu ((sach trinh) OR (sach tranh)) cong khi đong luc ) or ( tu sach nganh cong thai đong luc ))".
• Adding a wildcard symbol may retrieve word variants: (( tu ((sach trinh) OR (sach tranh)) cong khi đong luc ) or ( tu sach nganh cong thai đong luc ))*.