Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doanh van » doan van, doanh va, doanh ban
sach thu » sach thue, sach thieu, sach tham
thu bang » thu ban, thu hang, chu bang
kham luc » khai luoc, kham cuoc, nhan luc
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, su sach, te sach
bang xa » lang xa, bang va, mang xa
hieu vu » hieu va, hieu ve, hieu su
vu kham » vu khanh
cua tre » cua te, cuu tre, dua tren
luc va » duc va, tuc va, loc va

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 thu bang xa hoi. hieu vu kham luc va doanh van ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu bang xa hoi. hieu vu kham luc va doanh van ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach thu bang xa hoi. hieu vu kham luc va doanh van ((cua tre) or (cua triet))*.