Perhaps you should try some spelling variations:
nhanh hoa » nhanh hoan, thanh hoa, khanh hoa
tinh hoc » sinh hoc, tin hoc, hinh hoc
dong luc » nang luc
gian van » giang van, gian dan, gian lan
tu tinh » tru tinh, tu tin, thue tinh
hoi dan » hoa dan, hoc dan, hoi dap
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu tinh hoc tap, nghien cuu ((dong luc) or (dong co)) nhanh hoa hoc ma hoi dan gian van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu tinh hoc tap, nghien cuu ((dong luc) OR (dong co)) nhanh hoa hoc ma hoi dan gian van.
• Adding a wildcard symbol may retrieve word variants: tu tinh hoc tap, nghien cuu ((dong luc) or (dong co)) nhanh hoa hoc ma hoi dan gian van*.