Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
thanh nam » hanh nam, thanh tam, thanh pham
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
cau luc » cau phuc
ma hoi » mai hoi, xa hoi, ma hoa
cua tu » cua tuc, cua su, cua cu

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 ky nang ma hoi. hieu qua ((cau luc) or (cau truc)) ban ((thanh dat) or (thanh nam)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. hieu qua ((cau luc) OR (cau truc)) ban ((thanh dat) OR (thanh nam)) cua tu.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoi. hieu qua ((cau luc) or (cau truc)) ban ((thanh dat) or (thanh nam)) cua tu*.