Perhaps you should try some spelling variations:
thien van » thi van
van hang » van khang, van hoang, van thang
duc tren » duoc tren, dua tren, duc tien
tu sach » thu sach, su sach, te sach
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
nam duc » nam duoc, pham duc, nam thuc
va hang » va nang, va lang, va hanh
doi duc » do duc, doi duy, oi duc

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 ((ky lang) or (ky dang)) xa hoi. thien van nam duc ((va hang) OR (van hang)) doi duc tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (ky dang)) xa hoi. thien van nam duc ((va hang) OR (van hang)) doi duc tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky lang) or (ky dang)) xa hoi. thien van nam duc ((va hang) OR (van hang)) doi duc tren".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) or (ky dang)) xa hoi. thien van nam duc ((va hang) OR (van hang)) doi duc tren*.