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