Perhaps you should try some spelling variations:
luc nhanh » luc nhan, luc nganh, luc canh
nhanh hoa » nhanh hoan, thanh hoa, khanh hoa
sach hoc » sach hoi, mach hoc, sach duoc
cach hoc » cach thuc, cach thoi, dich hoc
cuu dong » cuu cong, cuu tong, cuu long
dong luc » nang luc
dam gian » dan gian, don gian, nam giao
gian dan » gian lang
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
hoi dam » hoi dap, hoi dan, hoi dat

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

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