Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
cau tuc » cau truc, cau tu, cau luc
van tri » van tai, van thi, van toi
va cau » van cau, va cac, va dau
tuc va » thuc va, truc va, tuc xa
cua su » qua su

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky ((nang xa) OR (nang ma)) hoi. lieu va cau tuc va van tri cua su~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky ((nang xa) OR (nang ma)) hoi. lieu va cau tuc va van tri cua su~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky ((nang xa) OR (nang ma)) hoi. lieu va cau tuc va van tri cua su*.