Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
doc sach » hoc sach, toc sach, nuoc sach
vat danh » va danh, van danh, luat danh
viet cua » viec cua, viet ca, biet cua
viet qua » vien quan, ket qua, viet ha
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va tham » van tham, va cham, va thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach ky nang xa hoi. lieu va tham thuc vat danh ((viet cua) or (viet qua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ky nang xa hoi. lieu va tham thuc vat danh ((viet cua) OR (viet qua)) tre.
• Adding a wildcard symbol may retrieve word variants: doc sach ky nang xa hoi. lieu va tham thuc vat danh ((viet cua) or (viet qua)) tre*.