Perhaps you should try some spelling variations:
lang tai » lang thai, hang tai, tang tai
hoa lang » hoa dan, hoa van
so sach » so sanh, bo sach, co sach
cau tuc » cau tu, cau luc, cau phuc
tai cua » thai cua, tai cuc, tri cua
hieu ke » hieu kem, chieu ke, hieu ky
sach ty » sach y, sach tu, sach thu
cai hoi » dai hoi, cai hoa, lai hoi
ty nang » ky nang, ty xang, ty hang
cua te » cua tu

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 ty nang ((cai hoi) or (cau hoi)). hieu ke ((cau tuc) OR (cau truc)) hoa lang tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang ((cai hoi) OR (cau hoi)). hieu ke ((cau tuc) OR (cau truc)) hoa lang tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang ((cai hoi) or (cau hoi)). hieu ke ((cau tuc) OR (cau truc)) hoa lang tai cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ty nang ((cai hoi) or (cau hoi)). hieu ke ((cau tuc) OR (cau truc)) hoa lang tai cua te*.