Perhaps you should try some spelling variations:
trinh hoa » trinh do, trinh han
sach gan » sach ngan, sach han, sach san
gan bang » ngan bang, can bang, gan hang
bang khi » ban khi, dang khoi, dang khai
so sach » so sanh, bo sach, co sach
hoa thi » hoa thai, ha thi, hoa phi
vu sach » vu bach, vu khach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((su sach) or (so sach)) trinh hoa thi đong luc ) or ( vu sach gan bang khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((su sach) OR (so sach)) trinh hoa thi đong luc ) OR ( vu sach gan bang khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( ((su sach) or (so sach)) trinh hoa thi đong luc ) or ( vu sach gan bang khi đong luc ))*.