Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
cau thuc » cau truc, can thuc, cau phuc
cuu thuc » cuu tac
dan hanh » dang hanh, dan khanh, dan thanh
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hanh te » hanh tu, hanh ve, hanh de
te cua » tue cua, le cua, de cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky nang xa hoi. hieu van ((cau thuc) OR (cuu thuc)) dan hanh te cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang xa hoi. hieu van ((cau thuc) OR (cuu thuc)) dan hanh te cua te".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang xa hoi. hieu van ((cau thuc) OR (cuu thuc)) dan hanh te cua te*.