Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
nam thuoc » nam thuc, nam thu, nha thuoc
danh hai » dang hai, lanh hai, manh hai
hieu van » thien van, lieu va, hieu ve
nam danh » nam dinh, nam dan
hai cau » hai chau, hai chu, hai hau
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
cam tuc » cam xuc, cam tu, nam thuc

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 nang ma hoa. ((hieu van) or (hieu va)) ((cam tuc) or (nam thuoc)) nam danh hai cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang ma hoa. ((hieu van) OR (hieu va)) ((cam tuc) OR (nam thuoc)) nam danh hai cau triet.
• Adding a wildcard symbol may retrieve word variants: su sach ly nang ma hoa. ((hieu van) or (hieu va)) ((cam tuc) or (nam thuoc)) nam danh hai cau triet*.