Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hieu van » hieu va, thien van, lieu va
lam truc » lam truoc, nam truc, lam thuoc
cuu tre » cua tre, cau tren
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
sach ly » sach y, sach lo, sach hay
lang xa » lang ha, dang xay, lang van
sach ty » sach y, sach tu, sach thu
van lam » van nam

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) OR (sach ty)) lang xa hoi. hieu van lam truc va hanh vi ((cuu tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ly) OR (sach ty)) lang xa hoi. hieu van lam truc va hanh vi ((cuu tre) OR (cau treo))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ly) OR (sach ty)) lang xa hoi. hieu van lam truc va hanh vi ((cuu tre) or (cau treo))*".