Perhaps you should try some spelling variations:
chien duoc » chien luoc, chien cuoc, che duoc
cua triet » cua viet, su triet, va triet
van chien » van hien, van hieu, van tien
cau tren » cu tren, dau tren, ca tren
hieu van » hieu va, thien van, lieu va
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
duoc va » nuoc va, duc va, duoc ma
va hanh » van hanh, va thanh, va danh
te sach » toc sach
sach v » sach va, sach y, sach 2

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach v ((nang xa) or (lang xa)) hoi. hieu van chien duoc va hanh vi ((cau tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v ((nang xa) OR (lang xa)) hoi. hieu van chien duoc va hanh vi ((cau tren) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: te sach v ((nang xa) or (lang xa)) hoi. hieu van chien duoc va hanh vi ((cau tren) or (cua triet))*.