Perhaps you should try some spelling variations:
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
danh vai » danh sai, doanh van, dang van
cau tren » cu tren, dau tren, ca tren
lai hoa » dai hoa, loai hoc
ky sang » ky dang, ky tang, duy sang
danh va » doanh va, hanh va, anh va
van cam » van nam, van lam, van cau
xuc va » duc va, tuc va, luc va

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 ((ky sang) or (ky nang)) lai hoa. thien van cam xuc va ((danh vai) OR (danh va)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ky sang) OR (ky nang)) lai hoa. thien van cam xuc va ((danh vai) OR (danh va)) cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ky sang) or (ky nang)) lai hoa. thien van cam xuc va ((danh vai) OR (danh va)) cau tren".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ky sang) or (ky nang)) lai hoa. thien van cam xuc va ((danh vai) OR (danh va)) cau tren*.