Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
sach ty » sach y, sach thu, xach tay
sach tu » sach thu, cach tu, sach uu
hieu ke » hieu kem, chieu ke, hieu ky
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
ke cau » ket cau
vi cau » va cau, ve cau, di 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: nuoc ((sach ty) or (sach tu)) nang x hoi. hieu ke cau truc va danh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc ((sach ty) OR (sach tu)) nang x hoi. hieu ke cau truc va danh vi cau tren.
• Adding a wildcard symbol may retrieve word variants: nuoc ((sach ty) or (sach tu)) nang x hoi. hieu ke cau truc va danh vi cau tren*.