Perhaps you should try some spelling variations:
nguoi sach » nguoi san
nuoc sach » hoc sach, cuoc cach, cuon sach
tinh bai » tinh bac, hinh bai, tinh bao
tinh hai » tinh thai, tinh chat, trinh han
nhan luc » nang luc
hieu ve » hieu va, hieu van
ve nhan » ve nha, de nhan, va nhan
nang xa » nang x, lang xa, nang ma
luc va » duc va, tuc va, loc va
y nang » ky nang, ly nang, v nang
ca tre » ca tren, cua tre, ca tru

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((nuoc sach) OR (nguoi sach)) y nang xa hoi. hieu ve nhan luc va ((tinh bai) or (tinh hai)) ca tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nuoc sach) OR (nguoi sach)) y nang xa hoi. hieu ve nhan luc va ((tinh bai) OR (tinh hai)) ca tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nuoc sach) OR (nguoi sach)) y nang xa hoi. hieu ve nhan luc va ((tinh bai) or (tinh hai)) ca tre".
• Adding a wildcard symbol may retrieve word variants: ((nuoc sach) OR (nguoi sach)) y nang xa hoi. hieu ve nhan luc va ((tinh bai) or (tinh hai)) ca tre*.