Perhaps you should try some spelling variations:
thien van » thi van
su triet » su viet, ve triet
so sach » so sanh, bo sach, co sach
dan vai » dan va, dan tai, dan vat
truc va » thuc va, thuc vat, trung va
van cau » van dau, van hau, van chat
nang ma » tang ma, sang ma, nang cao
vu khac » vu kham, vu khanh, bui khac
su tien » su kien, su hien, tu tieng
ma hoi » mai hoi, xa hoi, ma hoa
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (vu khac)) ky nang ma hoi. thien van cau truc va dan vai ((su triet) OR (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (vu khac)) ky nang ma hoi. thien van cau truc va dan vai ((su triet) OR (su tien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (vu khac)) ky nang ma hoi. thien van cau truc va dan vai ((su triet) OR (su tien))".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (vu khac)) ky nang ma hoi. thien van cau truc va dan vai ((su triet) OR (su tien))*.