Perhaps you should try some spelling variations:
luat ngan » cua ngan, luat dan
hieu van » hieu va, thien van, lieu va
luc nhan » luc nhat, cu nhan, tue nhan
dua tren » dung tren
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
van cau » van dau, van hau, van chat
ca tren » cau tren, cu tren, la tren
y lang » o lang, _ lang, tay lang
hang » nang, dang, bang

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 y lang xa hoi. hieu van cau ((luc nhan) or (luat ngan)) hang va ((ca tren) or (dua tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y lang xa hoi. hieu van cau ((luc nhan) OR (luat ngan)) hang va ((ca tren) OR (dua tren)).
• Adding a wildcard symbol may retrieve word variants: su sach y lang xa hoi. hieu van cau ((luc nhan) or (luat ngan)) hang va ((ca tren) or (dua tren))*.