Perhaps you should try some spelling variations:
luat ngan » cua ngan, luat dan
cuu cong » cua cong, thu cong, cac cong
luc ngan » luc nganh, luc nhan, vu ngan
cao hoi » cau hoi, co hoi, cao hoc
hoi tap » hoi dap, hoc tap, hoi tai
va nhan » van nhan, ca nhan, va phan
nhan va » nhan tai, nhan dan, nhan tao
hoa va » hoa van, hoa xa, hoa vo

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc cao hoi tap, nghien cuu cong ((luc ngan) OR (luat ngan)) hoa hoc ma hoa va nhan va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc cao hoi tap, nghien cuu cong ((luc ngan) OR (luat ngan)) hoa hoc ma hoa va nhan va".
• Adding a wildcard symbol may retrieve word variants: hoc cao hoi tap, nghien cuu cong ((luc ngan) OR (luat ngan)) hoa hoc ma hoa va nhan va*.