Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hieu van » hieu va, thien van, lieu va
manh hai » lanh hai, minh hai, thanh hai
hai cau » hai chau, hai chu, hai hau
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
ly nang » ky nang, ly hang, ly vang
lo nang » ho nang, loai nang, cao nang
van lam » van nam
tuc va » truc va, tuc xa, duc va

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