Perhaps you should try some spelling variations:
truong va » truong dai, truong cao, truong dao
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
di va » dai va, di vao, doi va

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 cam) or (va cam)) truong va hanh di va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu ((ve cam) OR (va cam)) truong va hanh di va triet.
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu ((ve cam) or (va cam)) truong va hanh di va triet*.