Perhaps you should try some spelling variations:
nguoi sach » nguoi san, nuoc sach
dao trung » do trung, dac trung, dao trong
thanh tri » thanh tra, thanh tai, chinh tri
trung va » truong va, trang va, trung ha
su sach » so sach, vu sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
han tri » han tai, van tri, chan troi
cua tre » cua te, cuu tre, cua triet
va dao » ca dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (nguoi sach)) ky lang xa hoi. lieu va dao trung va ((han tri) OR (thanh tri)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (nguoi sach)) ky lang xa hoi. lieu va dao trung va ((han tri) OR (thanh tri)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (nguoi sach)) ky lang xa hoi. lieu va dao trung va ((han tri) OR (thanh tri)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (nguoi sach)) ky lang xa hoi. lieu va dao trung va ((han tri) OR (thanh tri)) cua tre*.