Perhaps you should try some spelling variations:
sach thanh » sach tranh, sach tham, danh thanh
canh trinh » canh tranh, hanh trinh, canh tinh
sach thap » sach tham, sach phap, sach nha
thanh tri » thanh tra, thanh tai, chinh tri
thap tai » phap tai, tap tai, thai tai
trinh tu » trinh ky, trinh do
tu sach » thu sach, te sach, tu cach
su canh » suc canh, su can, su anh
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: (( tu sach thap tai ) or ((( su canh trinh tu ) or ( su sach thanh tri ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach thap tai ) OR ((( su canh trinh tu ) OR ( su sach thanh tri )))).
• Adding a wildcard symbol may retrieve word variants: (( tu sach thap tai ) or ((( su canh trinh tu ) or ( su sach thanh tri ))))*.