Perhaps you should try some spelling variations:
sach tranh » canh tranh
canh trinh » canh tranh, hanh trinh, canh tinh
tranh hinh » tranh minh, trinh hinh, tran dinh
hinh thai » sinh thai, tinh thai, dinh thi
thu canh » thuc hanh, thu cong, thu ban
trinh co » trinh do, trinh cong, trinh hoa
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu canh trinh co khi đong luc ) or ( su sach tranh hinh thai đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu canh trinh co khi đong luc ) OR ( su sach tranh hinh thai đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( thu canh trinh co khi đong luc ) or ( su sach tranh hinh thai đong luc ))*.