Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
thanh tai » thanh hai, thanh toan, doanh tai
thanh vai » thanh hai, thanh van, thanh oai
qua ban » cua ban, qua quan
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
nam qua » nam quan, nam cua, nam mua
y nang » ky nang, ly nang, v nang
va nam » van nam, ha nam, va nay
ma hoi » mai hoi, xa hoi, me hoi

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 y nang ((ma hoi) or (ma hoa)). hieu va nam qua ban ((thanh vai) OR (thanh tai)) cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((ma hoi) OR (ma hoa)). hieu va nam qua ban ((thanh vai) OR (thanh tai)) cau triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((ma hoi) or (ma hoa)). hieu va nam qua ban ((thanh vai) OR (thanh tai)) cau triet*".