Perhaps you should try some spelling variations:
ha trung » he trung, ba trung, va trung
danh vai » danh sai, danh va, doanh van
trung va » truong va, trang va, trung ha
tu sach » thu sach, te sach, tu cach
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
thi van » thi lan, thi hanh, thi nang
su sach » so sach, vu sach
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) ky nang x hoi. ((thien van) OR (thi van)) ha trung va danh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang x hoi. ((thien van) OR (thi van)) ha trung va danh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang x hoi. ((thien van) OR (thi van)) ha trung va danh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang x hoi. ((thien van) OR (thi van)) ha trung va danh vai cua tre*.