Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thi van » thi lan, thi hanh, thi nang
duc van » duc va, duc tan, duc manh
xuc ban » duc ban, cuc ban, quoc ban
lang xa » dang xay, lang van
lang ha » long ha
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: thuat sach o ((lang xa) or (lang ha)) hoi. thi van nam ((xuc ban) or (duc van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach o ((lang xa) OR (lang ha)) hoi. thi van nam ((xuc ban) OR (duc van)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat sach o ((lang xa) or (lang ha)) hoi. thi van nam ((xuc ban) or (duc van)) hanh vi cua tre*.