Perhaps you should try some spelling variations:
cuu cong » cua cong, thu cong, cac cong
cong luc » dong luc, cong suc, cong duc
luc ngan » luc nganh, luc nhan, luat ngan
ngan hoa » nganh hoa, nhan hoa, nganh khoa
nhan tai » hang tai, van tai, toan tai
hoi tap » hoi dap, hoi tai, hai tap
va nhan » van nhan, ca nhan, va phan
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) OR (hoc tap)), nghien cuu cong luc ngan hoa hoc ma hoa va nhan tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc cao ((hoi tap) OR (hoc tap)), nghien cuu cong luc ngan hoa hoc ma hoa va nhan tai".
• Adding a wildcard symbol may retrieve word variants: hoc cao ((hoi tap) OR (hoc tap)), nghien cuu cong luc ngan hoa hoc ma hoa va nhan tai*.