Perhaps you should try some spelling variations:
hoach hoi » hoc hoi, hoach ha, sach hoi
phan hoan » phap hoan, phan hoa, pham hoang
hach hoc » cach hoc, mach hoc, hoach hoa
cuu nang » chuc nang, cam nang, cuu van
nang hoc » nang doc, nang luc, dong hoc
hoc phan » hoc dan, hoc pho
hoan hoc » hoa hoc, toan hoc, hoang hoa
phat van » pham van, phan van, phap van
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 ((hach hoc) OR (hoach hoi)) tap, nghien cuu nang hoc phan hoan hoc ma hoi va phat van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((hach hoc) OR (hoach hoi)) tap, nghien cuu nang hoc phan hoan hoc ma hoi va phat van".
• Adding a wildcard symbol may retrieve word variants: tu ((hach hoc) OR (hoach hoi)) tap, nghien cuu nang hoc phan hoan hoc ma hoi va phat van*.