Perhaps you should try some spelling variations:
thanh va » thanh van, hanh va, thanh ve
thanh ha » thanh hoa, thanh hai, nhanh ha
va trien » va truyen, va thiet, va tieng
va tuyen » va truyen, tac tuyen, ke tuyen
tu sach » thu sach, su sach, te sach
cao hoc » co hoc, cho hoc, chat hoc
qua cam » qua cham, qua cac, qua ca
xuc ban » duc ban, cuc ban, quoc ban
y nang » ky nang, ly nang, v nang

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 y nang cao hoc. hieu qua cam xuc ban ((thanh va) or (thanh ha)) ((va trien) OR (va tuyen))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang cao hoc. hieu qua cam xuc ban ((thanh va) OR (thanh ha)) ((va trien) OR (va tuyen)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang cao hoc. hieu qua cam xuc ban ((thanh va) or (thanh ha)) ((va trien) OR (va tuyen))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang cao hoc. hieu qua cam xuc ban ((thanh va) or (thanh ha)) ((va trien) OR (va tuyen))*.