Perhaps you should try some spelling variations:
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
ly nang » ky nang, ly hang, ly vang
vu nang » vuc nang, va nang, vu dang
nam qua » nam quan, nam cua, nam mua
qua ban » cua ban, qua quan
hanh di » hanh de, hang di, danh di
cua tre » cua te, cuu tre, cua triet

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 ((ly nang) or (vu nang)) x ho. thien van nam qua ban ((hanh di) OR (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ly nang) OR (vu nang)) x ho. thien van nam qua ban ((hanh di) OR (hanh vi)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ly nang) or (vu nang)) x ho. thien van nam qua ban ((hanh di) OR (hanh vi)) cua tre*".