Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
lang van » dang van, tang van, hoang van
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
vi cau » va cau, ve cau, di cau

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 y ((nang xa) or (lang van)) hoi. ((hieu ve) or (hieu va)) cau truc va hanh vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (lang van)) hoi. ((hieu ve) OR (hieu va)) cau truc va hanh vi cau treo.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (lang van)) hoi. ((hieu ve) or (hieu va)) cau truc va hanh vi cau treo*.