Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vien dai » hien dai
nang cau » nang cao, hang cau, nang dau
ty nang » ky nang, ty xang, ty hang
sach ty » sach y, sach tu, sach thu
dinh va » dinh van, tinh va, sinh va
dinh ve » dinh ket, dinh van
tu sach » thu sach, su sach, te sach
ve cac » va cac, vien cac
lao va » tao va, cao va, bao va

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 ty nang cau hoi. hieu ((ve cac) or (vien dai)) lao va ((dinh va) or (dinh ve)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang cau hoi. hieu ((ve cac) OR (vien dai)) lao va ((dinh va) OR (dinh ve)) cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang cau hoi. hieu ((ve cac) or (vien dai)) lao va ((dinh va) or (dinh ve)) cua triet*.