Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
hieu ve » hieu va, hieu van
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
vu sach » su sach, vu khach
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, de cua
bach » cach, bac

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)) ly ((mang may) or (nang ma)) hoi. hieu ve cham luc va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu bach)) ly ((mang may) OR (nang ma)) hoi. hieu ve cham luc va hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vu bach)) ly ((mang may) or (nang ma)) hoi. hieu ve cham luc va hanh di cua tre*.