Perhaps you should try some spelling variations:
vat hanh » vat thanh, van hanh, va hanh
cau treo » cau theo, cau tren, cau triet
su sach » so sach, vu sach
ve cham » va cham, ve chat, vu cham
hanh di » hanh vi, hanh de, hang di
y nang » ky nang, ly nang, v nang
ve cam » ve cac, va cam, ve cai
di cau » da cau, diem cau
x hoi » xa hoi, o hoi, x ho

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 y nang x hoi. hieu ((ve cam) OR (ve cham)) thuc vat hanh di cau treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x hoi. hieu ((ve cam) OR (ve cham)) thuc vat hanh di cau treo".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu ((ve cam) OR (ve cham)) thuc vat hanh di cau treo*.