Perhaps you should try some spelling variations:
van triet » va triet, van thiet, van trieu
ban thanh » ban hanh
nam thuc » nam thuoc, am thuc, nam thu
ban hang » ngan hang
hang tai » hang va, dung tai
nang tai » tang tai, sang tai, nang cao
hieu va » lieu va, hieu qua
vu sach » vu bach, su sach, vu khach
sach v » sach va, sach y, sach 2
va nam » van nam, ha nam, va nay

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 v ((nang tai) OR (hang tai)) hoi. hieu va nam thuc ((ban thanh) or (ban hang)) va van triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach v ((nang tai) OR (hang tai)) hoi. hieu va nam thuc ((ban thanh) OR (ban hang)) va van triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach v ((nang tai) OR (hang tai)) hoi. hieu va nam thuc ((ban thanh) or (ban hang)) va van triet".
• Adding a wildcard symbol may retrieve word variants: vu sach v ((nang tai) OR (hang tai)) hoi. hieu va nam thuc ((ban thanh) or (ban hang)) va van triet*.