Perhaps you should try some spelling variations:
hanh mai » hanh ma, hanh mau, hanh may
va triet » va thiet, ve triet, cua triet
va trien » va truyen, va thiet, va tuyen
ky tang » ky nang, ky dang, kho tang
tang ha » lang ha, tang ma, trung ha
qua cac » cua cac
cac hoc » cach hoc, cac hop, bac hoc
va hanh » van hanh, va thanh, ban hanh
su xac » pu xac, su cac
xac ky » cac ky, sac ky, bac ky
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: su xac ky tang ha hoi. hieu qua cac hoc va hanh mai ((va triet) or (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky tang ha hoi. hieu qua cac hoc va hanh mai ((va triet) OR (va trien)).
• Adding a wildcard symbol may retrieve word variants: su xac ky tang ha hoi. hieu qua cac hoc va hanh mai ((va triet) or (va trien))*.