Perhaps you should try some spelling variations:
thien van » thi van
cau tren » cu tren, ca tren, cau treo
danh vai » danh sai, danh va, doanh van
thu sach » tu sach, thuat sach, thuoc sach
dau tren » dau tien, dat tren, dau tieng
lai hoi » dai hoi, lai hoa, lai roi
ky tang » ky nang, ky dang, kho tang
van cam » van nam, van lam, van cau
va danh » va dinh, va dan, va hanh
ky sang » ky nang, ky dang, duy sang
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 tang)) lai hoi. thien van cam xuc va danh vai ((cau tren) OR (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ky sang) OR (ky tang)) lai hoi. thien van cam xuc va danh vai ((cau tren) OR (dau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ky sang) or (ky tang)) lai hoi. thien van cam xuc va danh vai ((cau tren) OR (dau tren))".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ky sang) or (ky tang)) lai hoi. thien van cam xuc va danh vai ((cau tren) OR (dau tren))*.