Perhaps you should try some spelling variations:
cua triet » su triet, va triet
van doanh » toan doanh, van dong, van thanh
nang cau » nang cao, hang cau, nang dau
doanh va » doan va, doanh tai, doanh cua
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
cac lao » ca lao, cac loai, cac giao
lao van » dao van, cao van, lo van
ve cac » va cac, vien cac

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