Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
van hanh » van thanh, ban hanh, van anh
mat cua » ma cua, manh cua, mang cua
cau cua » cau qua, ca cua, chat cua
su sach » so sach, vu sach
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
duc van » duc va, duc tan, duc manh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
cu cua » ca cua, co cua, hu cua

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 va cham duc van hanh ((((cau cua) OR (cu cua))) or (mat cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu va cham duc van hanh ((((cau cua) OR (cu cua))) OR (mat cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. hieu va cham duc van hanh ((((cau cua) OR (cu cua))) or (mat cua)) triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu va cham duc van hanh ((((cau cua) OR (cu cua))) or (mat cua)) triet*.