Perhaps you should try some spelling variations:
tham nang » nham nang, tham nhung, thuat nang
tham lang » nham nang, pham hang, thai bang
phan duc » pham duc, phan tu, phan dau
va hanh » van hanh, va thanh, va danh
ke phan » ve phan, kenh phan, ke thang
tu sach » thu sach, su sach, te sach
hieu ke » hieu kem, chieu ke, hieu ky
vi su » va su, ve su, oi su
ki su » ky su

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 ((tham nang) OR (tham lang)) xa hoi. hieu ke phan duc va hanh ((vi su) or (ki su)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tham nang) OR (tham lang)) xa hoi. hieu ke phan duc va hanh ((vi su) OR (ki su)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tham nang) OR (tham lang)) xa hoi. hieu ke phan duc va hanh ((vi su) or (ki su)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((tham nang) OR (tham lang)) xa hoi. hieu ke phan duc va hanh ((vi su) or (ki su)) triet*.