Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van dinh » van minh, van dich, va dinh
va trien » va truyen, va thiet, va tuyen
te sach » toc sach
ly nang » ky nang, ly hang, ly vang
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
dinh ve » dinh ket, dinh van
y nang » ky nang, v nang, may nang
ve cam » ve cham, ve cac, va cam
ve va » ve van, te va, ke va
o hoi » co hoi, o hoc, o hai

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) or (te sach)) ((y nang) OR (ly nang)) o hoi. hieu ve cam xuc van dinh ve va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (te sach)) ((y nang) OR (ly nang)) o hoi. hieu ve cam xuc van dinh ve va trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (te sach)) ((y nang) OR (ly nang)) o hoi. hieu ve cam xuc van dinh ve va trien".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (te sach)) ((y nang) OR (ly nang)) o hoi. hieu ve cam xuc van dinh ve va trien*.