Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
vang mai » sang mai, hoang mai, giang mai
danh hai » dang hai, lanh hai, manh hai
lang mai » lang dai, lang hai, lang man
hieu van » hieu va, thien van, lieu va
hai cau » hai chau, hai chu, hai hau
thuc va » thuc vat, thuc dan, thuc day
truc va » thuc vat, trung va
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
van cam » van nam, van lam, van cau

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 ((vang mai) or (lang mai)) hoi. hieu van cam ((truc va) OR (thuc va)) danh hai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly ((vang mai) OR (lang mai)) hoi. hieu van cam ((truc va) OR (thuc va)) danh hai cau treo*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly ((vang mai) or (lang mai)) hoi. hieu van cam ((truc va) OR (thuc va)) danh hai cau treo*".