Perhaps you should try some spelling variations:
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
ba truc » cau truc, ba trung, dai truc
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
ha truc » ha thuc, hang truc, cau truc
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
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: ((thu sach) or (su sach)) ky nang x hoi. thien van ((ha truc) OR (ba truc)) va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) ky nang x hoi. thien van ((ha truc) OR (ba truc)) va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (su sach)) ky nang x hoi. thien van ((ha truc) OR (ba truc)) va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ky nang x hoi. thien van ((ha truc) OR (ba truc)) va hanh vai cua tre*.