Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
ban hanh » ban hang
nhan cuc » nhan cuoc, nhanh cuc, nhan luc
su triet » su viet, su tien, ve triet
nang ma » tang ma, sang ma, nang cao
sach ky » sac ky, sach y, sach kem
va nhan » van nhan, ca nhan, va phan
sach ty » sach y, sach tu, sach thu
cuc ban » cua ban, cac ban, cuu ban
hieu va » lieu va, hieu qua
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: thu ((sach ky) or (sach ty)) nang ma hoi. hieu va nhan cuc ban hanh vi ((va trien) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach ty)) nang ma hoi. hieu va nhan cuc ban hanh vi ((va trien) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sach ty)) nang ma hoi. hieu va nhan cuc ban hanh vi ((va trien) or (su triet))*.