Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
lang xa » dang xay, lang van
lang ha » long ha
thi van » thi lan, thi hanh, thi nang
xuc van » luc van, xuc ban, thuc van
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
sach o » sach lo, sac o, sach y
vi cua » vai cua, di cua

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 o ((lang xa) OR (lang ha)) hoi. thi van nam ((xuc van) or (duc van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach o ((lang xa) OR (lang ha)) hoi. thi van nam ((xuc van) OR (duc van)) hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach o ((lang xa) OR (lang ha)) hoi. thi van nam ((xuc van) or (duc van)) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach o ((lang xa) OR (lang ha)) hoi. thi van nam ((xuc van) or (duc van)) hanh vi cua tre*.