Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cau thuc » cau truc, cuu thuc, can thuc
ky lang » ky dang, ky tang, tay lang
hieu ke » hieu kem, chieu ke, hieu ky
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
vu hanh » vu khanh, vu thanh, du hanh
ha hoi » hoa hoi, ha noi, xa hoi
ke cau » ket cau
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu hanh ((ky lang) OR (ky nang)) ha hoi. hieu ke cau thuc ((va hanh) or (va danh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu hanh ((ky lang) OR (ky nang)) ha hoi. hieu ke cau thuc ((va hanh) OR (va danh)) vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu hanh ((ky lang) OR (ky nang)) ha hoi. hieu ke cau thuc ((va hanh) or (va danh)) vi cua triet*".