Perhaps you should try some spelling variations:
nganh cong » nhanh chong, thanh cong
cac nganh » hoc nganh
cong khi » cong thai, khong khi, co khi
sach han » sach tham, sach danh, sach nang
vu sach » vu bach, su sach, vu khach
su cac » tu cac, su cao, su can
ly khi » ly chi
y khi » ky khi, my khi, y chi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su cac nganh cong khi đong luc ) or ( vu sach han ((y khi) OR (ly khi)) đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su cac nganh cong khi đong luc ) OR ( vu sach han ((y khi) OR (ly khi)) đong luc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( su cac nganh cong khi đong luc ) or ( vu sach han ((y khi) OR (ly khi)) đong luc ))".
• Adding a wildcard symbol may retrieve word variants: (( su cac nganh cong khi đong luc ) or ( vu sach han ((y khi) OR (ly khi)) đong luc ))*.