Perhaps you should try some spelling variations:
truc van » truc va, thuc van, truc ban
sach ty » sach y, sach thu, xach tay
sach tu » sach thu, cach tu, sach uu
cao hoi » cau hoi, co hoi, cao hoc
van han » van hanh, van phan, van nhan
tai cua » thai cua, tri cua, dai cua
va cau » van cau, va cac, 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: tu ((sach ty) OR (sach tu)) nang cao hoi. lieu va cau truc van han ((tai cua) or (tai cuc)) tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) nang cao hoi. lieu va cau truc van han ((tai cua) OR (tai cuc)) tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach tu)) nang cao hoi. lieu va cau truc van han ((tai cua) or (tai cuc)) tuc".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach tu)) nang cao hoi. lieu va cau truc van han ((tai cua) or (tai cuc)) tuc*.