Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vuc tuan » duc thuan, quoc tuan, van tuan
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
lang xa » lang ha, dang xay, lang van
qua cac » cua cac
vu tuan » vu xuan, va tuan, vu tuat
anh hai » lanh hai, manh hai, anh thai
hai cua » thai cua, dai cua, hoi cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((nang ma) or (lang xa)) hoi. hieu qua cac ((vuc tuan) OR (vu tuan)) anh hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang ma) OR (lang xa)) hoi. hieu qua cac ((vuc tuan) OR (vu tuan)) anh hai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang ma) or (lang xa)) hoi. hieu qua cac ((vuc tuan) OR (vu tuan)) anh hai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang ma) or (lang xa)) hoi. hieu qua cac ((vuc tuan) OR (vu tuan)) anh hai cua triet*.