Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cham cuu » cap cuu, chat cua
hai chu » hai chau, hoi chu, hai chi
hoa cau » hoa cac, hoa dau, hoa mau
va cham » va chat, va tham
sach ly » sach y, sach ty, sach hay
mai hoi » mai khoi, dai hoi, lai hoi
van mai » van hai, van ai, ban mai
sach lo » sach dao, sach doi, sach hoi
hieu va » lieu va, hieu qua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ly) OR (sach lo)) van mai hoi. hieu va cham cuu van hanh ((hoa cau) or (hai chu)) treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ly) OR (sach lo)) van mai hoi. hieu va cham cuu van hanh ((hoa cau) OR (hai chu)) treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ly) OR (sach lo)) van mai hoi. hieu va cham cuu van hanh ((hoa cau) or (hai chu)) treo".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ly) OR (sach lo)) van mai hoi. hieu va cham cuu van hanh ((hoa cau) or (hai chu)) treo*.