Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cau triet » cau trieu, su triet, va triet
danh hai » dang hai, lanh hai, manh hai
va danh » va dinh, va dan, va hanh
lam tuc » lam thuoc, lam truoc, luat tuc
su sach » vu sach
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
va lam » van lam, va lap
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa

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

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