Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
canh khoa » anh khoa, xanh khoa, doanh khoa
sach hoc » cach hoc, sach hoi, mach hoc
cuu nang » chuc nang, cam nang, cuu van
khoa hoc » hoa hoc
hoa phan » hoa dan, co phan
nhan van » nhan dan, nhan va, phan van
hoa van » hoa dan, hoang van, hoa lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach hoc tap, nghien cuu nang luc canh khoa hoc ma ((hoa van) OR (hoa phan)) nhan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach hoc tap, nghien cuu nang luc canh khoa hoc ma ((hoa van) OR (hoa phan)) nhan van".
• Adding a wildcard symbol may retrieve word variants: thuat sach hoc tap, nghien cuu nang luc canh khoa hoc ma ((hoa van) OR (hoa phan)) nhan van*.