Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, hieu ve
danh vai » danh sai, danh va, doanh van
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
cau tuc » cau truc, cau tu, cau luc
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y ((nang xa) or (lang xa)) hoi. ((hieu van) or (lieu va)) cau tuc va danh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((nang xa) OR (lang xa)) hoi. ((hieu van) OR (lieu va)) cau tuc va danh vai cua viet.
• Adding a wildcard symbol may retrieve word variants: thu sach y ((nang xa) or (lang xa)) hoi. ((hieu van) or (lieu va)) cau tuc va danh vai cua viet*.