Perhaps you should try some spelling variations:
thien van » thi van
tan thanh » tran thanh, tang thanh, toan thanh
thanh tri » thanh tra, thanh tai, chinh tri
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cau duc » cao duc, cau luc, chu duc
cua tuc » cua duc, cua tu, cua thuoc

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 ky ((nang ma) or (lang xa)) hoi. ((hieu va) or (thien van)) cau duc tan thanh tri cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang ma) OR (lang xa)) hoi. ((hieu va) OR (thien van)) cau duc tan thanh tri cua tuc.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang ma) or (lang xa)) hoi. ((hieu va) or (thien van)) cau duc tan thanh tri cua tuc*.