Perhaps you should try some spelling variations:
thien hach » thien thanh
hien hanh » dieu hanh
danh du » danh dau, danh tu, dinh du
va danh » va dinh, va dan, va hanh
sach ky » sac ky, sach y, sach kem
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren, cau treo
du cuu » tu cuu

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 ky) OR (sach ty)) nang xa hoi. hieu ((hien hanh) or (thien hach)) nuoc va danh du cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) nang xa hoi. hieu ((hien hanh) OR (thien hach)) nuoc va danh du cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach ty)) nang xa hoi. hieu ((hien hanh) or (thien hach)) nuoc va danh du cuu tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach ty)) nang xa hoi. hieu ((hien hanh) or (thien hach)) nuoc va danh du cuu tre*.