Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
van thang » van thanh, van khang, van hang
cua triet » cua viet, su triet, va triet
cau phuc » cau truc, chau phu, huu phuc
phuc van » thuc van, phuc va, chuc van
thang di » hang di, tang di, thang loi
dua tren » dung tren
nang xa » nang x, lang xa, nang ma
hieu ke » hieu kem, chieu ke, hieu ky
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
ke cau » ket cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc sach v nang xa hoi. hieu ke cau phuc van thang di ((dua tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach v nang xa hoi. hieu ke cau phuc van thang di ((dua tren) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: nuoc sach v nang xa hoi. hieu ke cau phuc van thang di ((dua tren) or (cua triet))*.