Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cam thuc » nam thuc, cam thu, can thuc
danh hai » dang hai, lanh hai, manh hai
cau treo » cau theo, cau tren, cau triet
sach ly » sach lo, sach ty, sach hay
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
hai cau » hai chau, hai chu, hai hau

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