Perhaps you should try some spelling variations:
viet cua » viec cua, viet ca, viet qua
van anh » van thanh, tuan anh, van minh
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach kem
cac bo » bac bo, cac co
cac lo » cac lop, cac co, cac ho
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((sach ky) OR (sach ty)) nang xa hoi. hieu ve ((cac lo) or (cac bo)) van anh viet cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach ky) OR (sach ty)) nang xa hoi. hieu ve ((cac lo) OR (cac bo)) van anh viet cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((sach ky) OR (sach ty)) nang xa hoi. hieu ve ((cac lo) or (cac bo)) van anh viet cua te".
• Adding a wildcard symbol may retrieve word variants: thuat ((sach ky) OR (sach ty)) nang xa hoi. hieu ve ((cac lo) or (cac bo)) van anh viet cua te*.