Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hieu thien » hieu hien, chieu chien, dieu khien
hach nuoc » sach nuoc, hoc nuoc, cac nuoc
sach ky » sac ky, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
cua cu » cua chu, cua cau, cua su

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ky) OR (sach y)) nang xa hoi. hieu thien hach nuoc va hanh vi cua cu~".
• Adding a wildcard symbol may retrieve word variants: so ((sach ky) OR (sach y)) nang xa hoi. hieu thien hach nuoc va hanh vi cua cu*.