Perhaps you should try some spelling variations:
chien duoc » chien luoc, chien cuoc, che duoc
van chien » van hien, van hieu, van tien
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
duoc va » nuoc va, duc va, duoc ma
va tinh » may tinh
via cua » gia cua, gian cua, giau cua
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
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: tu sach y nang o hoi. hieu van chien duoc va tinh ((via cua) or (gian xu)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang o hoi. hieu van chien duoc va tinh ((via cua) OR (gian xu)) te.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang o hoi. hieu van chien duoc va tinh ((via cua) or (gian xu)) te*.