Perhaps you should try some spelling variations:
hieu quan » hieu qua, lieu quan, thien quan
cau phuc » cau truc, chau phu, huu phuc
tay lang » tay tang, tay quang, tham lang
tai lang » tai cong, thi lan, tai san
quan cau » quang cao, toan cau, quan ha
va hanh » van hanh, va thanh, va danh
phuc va » phuc vu, thuc va, chuc va
tu sach » thu sach, su sach, te sach
van hoc » van hoa
cua tuc » cua duc, cua tu, cua thuoc
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: tu sach ((tay lang) or (tai lang)) van hoc. hieu quan cau phuc va hanh vi ((cua te) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tay lang) OR (tai lang)) van hoc. hieu quan cau phuc va hanh vi ((cua te) OR (cua tuc)).
• Adding a wildcard symbol may retrieve word variants: tu sach ((tay lang) or (tai lang)) van hoc. hieu quan cau phuc va hanh vi ((cua te) or (cua tuc))*.