Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
doanh vai » doanh tai, doanh va, doanh van
viec cac » vien cac, viec cua, viec lam
vai cuu » vai cua
ly toan » le toan, ly hoan, ly tran
lo toan » lo tan, le toan, so toan
sach ky » sac ky, sach y, sach ty
vu sach » vu bach, su sach, vu khach
lang ha » long ha
lang xa » dang xay, lang van
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky ((lang xa) or (lang ha)) hoi. hieu viec cac ((lo toan) OR (ly toan)) doanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky ((lang xa) OR (lang ha)) hoi. hieu viec cac ((lo toan) OR (ly toan)) doanh vai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky ((lang xa) or (lang ha)) hoi. hieu viec cac ((lo toan) OR (ly toan)) doanh vai cuu tre*".