Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
cau treo » cau theo, cau tren, cau trieu
hieu van » hieu va, thien van, lieu va
danh hai » dang hai, lanh hai, manh hai
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
van lam » van nam
tang ma » mang may, tang van
ly tang » le tang, ly hang, ly vang

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

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