Perhaps you should try some spelling variations:
thien van » thi van
van hanh » van thanh, ban hanh, van anh
cao hoi » cau hoi, co hoi, cao hoc
nam luu » nam suu, nam luat
tam luu » ta luu, tam buu
vai cua » dai cua, hai cua, lai cua
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
vi 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: te sac ky nang cao hoi. thien van ((nam luu) OR (tam luu)) van hanh ((vi cua) or (vai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang cao hoi. thien van ((nam luu) OR (tam luu)) van hanh ((vi cua) OR (vai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang cao hoi. thien van ((nam luu) OR (tam luu)) van hanh ((vi cua) or (vai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang cao hoi. thien van ((nam luu) OR (tam luu)) van hanh ((vi cua) or (vai cua)) triet*.