Perhaps you should try some spelling variations:
cau theo » cau thi, cau tao
danh hai » lanh hai, manh hai, danh hau
hang hai » hoang hai, hang tai, thanh hai
hieu van » hieu va, thien van, lieu va
dang hai » dang khai, dung hai, dong hai
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
thuc va » thuc vat, thuc dan, thuc day
vang xa » lang xa, mang xa, ang xa
ly vang » ly hang, ly van, ly quang
van am » van nam, van lam, van dam

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 ly vang xa hoi. hieu van am thuc va ((danh hai) or (((dang hai) OR (hang hai)))) cau theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly vang xa hoi. hieu van am thuc va ((danh hai) OR (((dang hai) OR (hang hai)))) cau theo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly vang xa hoi. hieu van am thuc va ((danh hai) or (((dang hai) OR (hang hai)))) cau theo".
• Adding a wildcard symbol may retrieve word variants: su sach ly vang xa hoi. hieu van am thuc va ((danh hai) or (((dang hai) OR (hang hai)))) cau theo*.