Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nhan luc » nang luc
tinh bai » tinh bac, hinh bai, tinh bao
tinh hai » tinh thai, tinh chat, trinh han
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
y lang » o lang, _ lang, tay lang
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 y lang xa hoi. hieu va 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 y lang xa hoi. hieu va nhan luc va ((tinh bai) OR (tinh hai)) ca tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach y lang xa hoi. hieu va nhan luc va ((tinh bai) or (tinh hai)) ca tre*.