Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua dieu
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
van bac » van ban, van bao, van hac
va phan » van phan, va phat, hoa phan
va phap » va phat, ban phap

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 ty nang xa hoi. thi van bac duc ((va phan) OR (va phap)) lap ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. thi van bac duc ((va phan) OR (va phap)) lap ((cua viet) OR (cua vat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. thi van bac duc ((va phan) OR (va phap)) lap ((cua viet) or (cua vat))".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. thi van bac duc ((va phan) OR (va phap)) lap ((cua viet) or (cua vat))*.