Perhaps you should try some spelling variations:
thanh tri » thanh tra, thanh tai, chinh tri
tay lang » tai lang, tay tang, tay quang
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
sach tay » xach tay, sach hay, sach nay
han tri » han tai, van tri, chan troi
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
tuc va » thuc va, truc va, tuc xa
xuc va » duc va, luc va, xac va
thiet » thieu

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 tay lang xa hoi. hieu van cham ((xuc va) or (tuc va)) ((han tri) or (thanh tri)) va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tay lang xa hoi. hieu van cham ((xuc va) OR (tuc va)) ((han tri) OR (thanh tri)) va thiet.
• Adding a wildcard symbol may retrieve word variants: tu sach tay lang xa hoi. hieu van cham ((xuc va) or (tuc va)) ((han tri) or (thanh tri)) va thiet*.