Perhaps you should try some spelling variations:
bao thuc » cao thuoc, am thuc, va thuc
vien cua » viec cua, dien cua, tien cua
va phan » van phan, va phat, va phap
va nhan » van nhan, ca nhan, va nha
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cuc ky » cua ky, cu ky
ve bao » te bao, va bao
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: thu ((cuc ky) OR (cac ky)) nang xa hoi. hieu ve bao thuc ((va nhan) or (va phan)) vien cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((cuc ky) OR (cac ky)) nang xa hoi. hieu ve bao thuc ((va nhan) OR (va phan)) vien cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((cuc ky) OR (cac ky)) nang xa hoi. hieu ve bao thuc ((va nhan) or (va phan)) vien cua te".
• Adding a wildcard symbol may retrieve word variants: thu ((cuc ky) OR (cac ky)) nang xa hoi. hieu ve bao thuc ((va nhan) or (va phan)) vien cua te*.