Perhaps you should try some spelling variations:
phan luu » phan huu, phap luu, thanh luu
van hanh » van thanh, ban hanh, van anh
va trien » va truyen, va thiet, va tuyen
hieu va » hieu qua
luu van » cuu van, luan van, luu hanh
su viet » so viet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang x hoi. ((hieu va) or (lieu va)) phan luu van hanh vi ((va trien) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang x hoi. ((hieu va) OR (lieu va)) phan luu van hanh vi ((va trien) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang x hoi. ((hieu va) or (lieu va)) phan luu van hanh vi ((va trien) or (su viet))*.