Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
doanh van » doan van, doanh va, doanh ban
hieu van » hieu va, thien van, lieu va
cac nuoc » cap nuoc, dat nuoc, cua nuoc
va doanh » van doanh, vay doanh, va danh
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cua triet, dua tren
cuu 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: thuat sach _ lang xa hoi. hieu van ((cac nuoc) or (hoc nuoc)) va doanh van ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach _ lang xa hoi. hieu van ((cac nuoc) OR (hoc nuoc)) va doanh van ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: thuat sach _ lang xa hoi. hieu van ((cac nuoc) or (hoc nuoc)) va doanh van ((cua tre) or (cuu tre))*.