Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
thi hanh » thi thanh
thi lan » thi nang, thi lien
hanh di » hanh vi, hanh de, hang di
xua van » xua va, qua van, cua van
nam xua » nam cua, nam mua, nam qua
cua tre » cua te, cuu tre, cua triet
thi van » thi nang
lang xa » lang ha, dang xay, lang van
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang
di cua » dai cua, doi cua, de 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 hanh))) or (thi lan)) nam xua van hanh di 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 hanh))) OR (thi lan)) nam xua van hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach o lang xa hoi. ((((thi van) or (thi hanh))) or (thi lan)) nam xua van hanh di cua tre*.