Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
dua tren » dung tren
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
sach ly » sach y, sach lo, sach ty
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
cac thu » cach thuc, cac thoi
thu va » thuc va, thue va, tu 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 ly ((mang may) or (lang xa)) hoi. hieu va cac thu va thanh vi ((dua tren) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly ((mang may) OR (lang xa)) hoi. hieu va cac thu va thanh vi ((dua tren) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: su sach ly ((mang may) or (lang xa)) hoi. hieu va cac thu va thanh vi ((dua tren) or (cau treo))*.