Perhaps you should try some spelling variations:
viec ban » viec lam, viec va, viec tai
sach thu » sach thue, sach thieu, sach tham
te sach » toc sach
thuc co » tuc co, thuat co, thuc cua
viec am » viec lam, viec ap, viec tai
nang xa » lang xa, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet
co dan » co ban, ca dan, cao dang
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach thu ((nang xa) or (nang x)) hoi. hieu ((viec am) OR (viec ban)) thuc co dan vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu ((nang xa) OR (nang x)) hoi. hieu ((viec am) OR (viec ban)) thuc co dan vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thu ((nang xa) or (nang x)) hoi. hieu ((viec am) OR (viec ban)) thuc co dan vi cua tre*".