Perhaps you should try some spelling variations:
gianh lai » gian lan
chau viet » chu viet, khau viet, cham viet
duc phan » dung phan, duc thang, duc phung
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ma hoi. hieu va chat ((duc phan) or (duc tan)) gianh lai chau viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. hieu va chat ((duc phan) OR (duc tan)) gianh lai chau viet.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. hieu va chat ((duc phan) or (duc tan)) gianh lai chau viet*.