Perhaps you should try some spelling variations:
vu sach » su sach, vu khach
nang ma » tang ma, sang ma, nang cao
dinh vi » dinh ve, dinh viet, dinh tri
va dinh » van dinh, va kinh, va tinh
su cham » su pham, tu cham, vu cham
hieu su » hieu sau, tieu su, hieu so
cuu tre » cua tre, cau tren, cau treo
nang xa » nang x, lang xa, mang xa
soc va » hoc va, loc va, doc va
vi cuu » vi luu, vinh cuu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) OR (vu bach)) lo ((nang xa) or (nang ma)) hoi. hieu su cham soc va dinh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu bach)) lo ((nang xa) OR (nang ma)) hoi. hieu su cham soc va dinh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu bach)) lo ((nang xa) or (nang ma)) hoi. hieu su cham soc va dinh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu bach)) lo ((nang xa) or (nang ma)) hoi. hieu su cham soc va dinh vi cuu tre*.