Perhaps you should try some spelling variations:
sach trinh » sach tranh, hanh trinh, sach kinh
nganh cong » nhanh chong, thanh cong
cao nganh » cac nganh, cau nganh, tao nganh
trinh co » trinh do, trinh cong, trinh hoa
cong khi » cong thai, khong khi, cong ha
su sach » so sach, vu sach
vu cao » cu cao, va cao

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 trinh co khi đong luc ) or ( vu cao nganh cong khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach trinh co khi đong luc ) OR ( vu cao nganh cong khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( su sach trinh co khi đong luc ) or ( vu cao nganh cong khi đong luc ))*.