Perhaps you should try some spelling variations:
danh hai » dang hai, lanh hai, manh hai
cau treo » cau theo, cau triet, cau trieu
cau tren » cu tren, dau tren, ca tren
sach ty » sach tu, sach thu, xach tay
nang xa » nang x, lang xa, nang ma
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
va cau » van cau, va cac, va dau

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