Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
tao khoi » tao hoi, thao khoa, lao khoa
lai cua » dai cua, hai cua, lai chau
hieu ve » hieu va
ky tang » ky nang, ky dang, kho tang
ky sang » ky nang, ky dang, duy sang
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: toc sach ((ky sang) or (ky tang)) tao khoi. ((hieu ve) OR (hieu van)) pham duc va thanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ky sang) OR (ky tang)) tao khoi. ((hieu ve) OR (hieu van)) pham duc va thanh lai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ky sang) or (ky tang)) tao khoi. ((hieu ve) OR (hieu van)) pham duc va thanh lai cua te".
• Adding a wildcard symbol may retrieve word variants: toc sach ((ky sang) or (ky tang)) tao khoi. ((hieu ve) OR (hieu van)) pham duc va thanh lai cua te*.