Perhaps you should try some spelling variations:
sach ky » sac ky, sach ty, sach kem
dan vat » dang vat, van vat, dan va
den vai » den va, den vay, den vi
ve chao » ve chat, ve cham, ve cho
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
xu cam » xuc cam, tu cam

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 y)) nang xa hoi. hieu ve chao xu cam ((den vai) or (dan vat)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) nang xa hoi. hieu ve chao xu cam ((den vai) OR (dan vat)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach y)) nang xa hoi. hieu ve chao xu cam ((den vai) or (dan vat)) cua tre*.