Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
tinh hai » tinh thai, tinh chat, trinh han
tinh bai » tinh bac, hinh bai, tinh bao
nhan luc » nang luc
hoc sach » hoc sinh, hoc cac, hoc anh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve nhan » ve nha, de nhan, va nhan
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
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: ((thuoc sach) OR (hoc 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: ((thuoc sach) OR (hoc 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: "((thuoc sach) OR (hoc 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: ((thuoc sach) OR (hoc sach)) y nang xa hoi. hieu ve nhan luc va ((tinh bai) or (tinh hai)) ca tre*.