Perhaps you should try some spelling variations:
hang doi » hang di, hang loi, huong doi
nhan luc » nang luc
qua nhan » cua nhan, qua nhat, qua phan
su sach » vu sach
doi cua » dai cua, hoi cua
va hang » van hang, va nang, va lang
cua tre » cua te, cuu tre, cua triet
ly nang » ky nang, ly hang, ly vang
so sach » so sanh, bo sach, co sach
luc va » duc va, tuc va, loc va
y nang » ky nang, v nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ((y nang) OR (ly nang)) ma hoi. hieu qua nhan luc va hang doi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ((y nang) OR (ly nang)) ma hoi. hieu qua nhan luc va hang doi cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ((y nang) OR (ly nang)) ma hoi. hieu qua nhan luc va hang doi cua tre*.