Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh lai » thanh hai, thanh lap, thanh loi
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thu hoach
hieu van » hieu va, thien van, lieu va
cao duc » dao duc, cao suc, giao duc
lai cua » dai cua, hai cua, lai chau
cam duc » cam xuc, pham duc, nam duoc
van xa » van xay, van ha, dan xa
ly van » le van, ly va, ly von
cua te » cua tu

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) OR (thuoc sach)) ly van xa hoi. hieu van ((cam duc) or (cao duc)) ban thanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) ly van xa hoi. hieu van ((cam duc) OR (cao duc)) ban thanh lai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuoc sach)) ly van xa hoi. hieu van ((cam duc) or (cao duc)) ban thanh lai cua te".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuoc sach)) ly van xa hoi. hieu van ((cam duc) or (cao duc)) ban thanh lai cua te*.