Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cam duc » cam xuc, pham duc, nam duoc
lai cua » dai cua, hai cua, lai chau
cao duc » dao duc, cao suc, giao duc
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
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: tu sach ty ((nang x) or (nang ma)) 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: tu sach ty ((nang x) OR (nang ma)) hoi. hieu van ((cam duc) OR (cao duc)) ban thanh lai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang x) or (nang ma)) hoi. hieu van ((cam duc) or (cao duc)) ban thanh lai cua te*.