Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
va triet » va thiet, cua triet, va viet
ve triet » su triet
va trien » va truyen, va thiet, va tuyen
nang ha » nang hai, nang han, nang hoa
hieu va » lieu va, hieu qua
cac hoc » cach hoc, cac hop, bac hoc
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 nang ha hoi. hieu va cac hoc va thanh vai ((va triet) or (((ve triet) OR (va trien))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky nang ha hoi. hieu va cac hoc va thanh vai ((va triet) OR (((ve triet) OR (va trien)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ky nang ha hoi. hieu va cac hoc va thanh vai ((va triet) or (((ve triet) OR (va trien))))".
• Adding a wildcard symbol may retrieve word variants: su xac ky nang ha hoi. hieu va cac hoc va thanh vai ((va triet) or (((ve triet) OR (va trien))))*.