Perhaps you should try some spelling variations:
nha thuoc » nha nuoc, nhan thuc, nha hoc
thanh ve » hanh ve, thanh va, thanh vien
va thanh » gia thanh, ban thanh, va tinh
thuoc va » thuc va, thuoc ma, thuong va
hieu he » hieu ve, hiem he, hieu le
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
luu tre » luu tru, cuu tre, luy tre
he nha » ke nha, ve nha, thep nha
ve luu » ke luu, vi luu

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) or (thu hoach)) ky ((nang xa) OR (nang ma)) hoi. hieu he nha thuoc va thanh ve luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) ky ((nang xa) OR (nang ma)) hoi. hieu he nha thuoc va thanh ve luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu hoach)) ky ((nang xa) OR (nang ma)) hoi. hieu he nha thuoc va thanh ve luu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) ky ((nang xa) OR (nang ma)) hoi. hieu he nha thuoc va thanh ve luu tre*.