Perhaps you should try some spelling variations:
sach trinh » sach tranh, hanh trinh, sach kinh
cac nganh » hoc nganh
nganh co » nganh cong, nganh hoa, nganh y
vu sach » vu bach, su sach, vu khach
trinh y » trinh ky, trinh ly, trinh _
so cac » sao cac, so cap, o cac
y khi » ly khi, ky khi, my khi

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

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