Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
qua phan » cua phan, qua than, quang phan
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
phan luc » nhan luc, phan duc, phan suc
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh
luc van » luoc van, luu van, duc van
te sach » toc sach
su sach » so sach, vu sach
ha hoi » hoa hoi, ha noi, xa hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (te sach)) ky dang ha hoi. hieu qua phan luc van hanh vi ((va triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (te sach)) ky dang ha hoi. hieu qua phan luc van hanh vi ((va triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (te sach)) ky dang ha hoi. hieu qua phan luc van hanh vi ((va triet) or (cua viet))*.