Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
lang xa » lang ha, dang xay, lang van
thi van » thi hanh, thi nang
thi lan » thi hanh, thi nang, thi lien
nam duc » nam duoc, pham duc, nam thuc
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang
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 hoi. ((thi van) or (thi lan)) nam duc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach o lang xa hoi. ((thi van) OR (thi lan)) nam duc van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach o lang xa hoi. ((thi van) or (thi lan)) nam duc van hanh vi cua tre*.