Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
hai cau » hai chau, hai chu, hai hau
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
lam tuc » lam thuoc, lam truoc, luat tuc
hieu va » lieu va, hieu qua
vu sach » vu bach, su sach, vu khach
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
so sach » so sanh, bo sach, co sach
ma hoi » mai hoi, xa hoi, ma hoa
va lam » van lam, va lap

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) or (so sach)) ly nang ma hoi. hieu va lam tuc ((va danh) OR (va hanh)) hai cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (so sach)) ly nang ma hoi. hieu va lam tuc ((va danh) OR (va hanh)) hai cau triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (so sach)) ly nang ma hoi. hieu va lam tuc ((va danh) OR (va hanh)) hai cau triet*".