Perhaps you should try some spelling variations:
hanh cong » thanh cong, hang cong, hanh dong
canh ngoc » canh ngon, anh ngoc, thanh ngoc
hoc sach » hoc sinh, hoc anh
cong khi » cong thai, khong khi, co khi
hoc canh » hoc anh, hoc can, hoc hanh
hoc cac » hoc cao
ngoc ly » ngoc lan
ly khi » ly chi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((hoc sach) or (hoc cac)) hanh cong khi đong luc ) or ( hoc canh ngoc ly khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((hoc sach) OR (hoc cac)) hanh cong khi đong luc ) OR ( hoc canh ngoc ly khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( ((hoc sach) or (hoc cac)) hanh cong khi đong luc ) or ( hoc canh ngoc ly khi đong luc ))*.