Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
thue nang » thien nang, thuat nang, thi nang
doanh ban » doanh bat, doanh van, doanh nhan
dau tren » dau tien, dat tren, dau tieng
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
ban dau » bat dau, ban dan, van dau
duy va » duy van, day va, duy v

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach thue nang xa hoi. ((hieu va) OR (lieu va)) pham ((duy va) or (duy vat)) doanh ban dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thue nang xa hoi. ((hieu va) OR (lieu va)) pham ((duy va) OR (duy vat)) doanh ban dau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thue nang xa hoi. ((hieu va) OR (lieu va)) pham ((duy va) or (duy vat)) doanh ban dau tren".
• Adding a wildcard symbol may retrieve word variants: tu sach thue nang xa hoi. ((hieu va) OR (lieu va)) pham ((duy va) or (duy vat)) doanh ban dau tren*.