Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
te sach » toc sach
su sach » so sach, vu sach
cao hoa » cao hoat, cao khoa, cau hoa
viec va » vien va, viec cua, viec lam
va hang » van hang, va nang, va lang
via cua » gia cua, gian cua, giau cua
y nang » ky nang, ly nang, v nang
va tac » va cac
tac va » tac da, tac xa, tuc va
va cua » va chua, ca cua, ma 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) or (su sach)) y nang cao hoa. hieu viec va tac va hang ((va cua) OR (via cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (su sach)) y nang cao hoa. hieu viec va tac va hang ((va cua) OR (via cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (su sach)) y nang cao hoa. hieu viec va tac va hang ((va cua) OR (via cua)) tre*".