Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
va trien » va truyen, va thiet, va tuyen
chat duc » chat xuc, chat doc, chet duoc
va triet » va thiet, ve triet, cua triet
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
nang ma » tang ma, sang ma, nang cao
su sach » so sach, vu sach
y nang » ky nang, ly nang, v nang
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: su sach y nang ma hoi. hieu ve chat duc va ((thanh lap) or (hanh kem)) ((va triet) OR (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu ve chat duc va ((thanh lap) OR (hanh kem)) ((va triet) OR (va trien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. hieu ve chat duc va ((thanh lap) or (hanh kem)) ((va triet) OR (va trien))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu ve chat duc va ((thanh lap) or (hanh kem)) ((va triet) OR (va trien))*.