Perhaps you should try some spelling variations:
nhien cac » hien cac, thien cac, hieu cac
ve triet » va trien, su triet
vien cac » vien bach, vien dai, gian cac
danh van » doanh van, dang van, dinh van
va danh » va dinh, va dan, va hanh
vien da » vien dai, hien dai
te sach » toc sach
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa
van ve » van de, ban ve, van le

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang ma hoi. thien ((nhien cac) or (((vien cac) OR (vien da)))) tuc va danh van ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ma hoi. thien ((nhien cac) OR (((vien cac) OR (vien da)))) tuc va danh van ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ma hoi. thien ((nhien cac) or (((vien cac) OR (vien da)))) tuc va danh van ve triet".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ma hoi. thien ((nhien cac) or (((vien cac) OR (vien da)))) tuc va danh van ve triet*.