Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
vinh cuu » dinh cuu, dinh cu, tinh cua
sinh cua » manh cua, dinh cuu, sinh va
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
vi cuu » vi luu
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu va cam duc van hanh ((vi cuu) or (((vinh cuu) or (sinh cua)))) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu va cam duc van hanh ((vi cuu) OR (((vinh cuu) OR (sinh cua)))) tre.
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu va cam duc van hanh ((vi cuu) or (((vinh cuu) or (sinh cua)))) tre*.