Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
cam truc » cau truc, nam truc, lam truoc
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
vu sach » vu bach, vu khach
va danh » va dinh, va dan, va hanh
su sach » so sach
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
vi cua » vai cua, di 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) or (vu sach)) y nang xa hoi. hieu va cam truc ((van hanh) or (va danh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) y nang xa hoi. hieu va cam truc ((van hanh) OR (va danh)) vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) y nang xa hoi. hieu va cam truc ((van hanh) or (va danh)) vi cua triet*.