Perhaps you should try some spelling variations:
dieu hien » dieu khien, dieu kien, bieu hien
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
va hanh » van hanh, va danh, ban hanh
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
lai cua » dai cua, hai cua, lai chau
sach ty » sach y, sach tu, sach thu
cac lop » cac hop, cac loai
cua te » cua tu
cac lo » cac co, cac bo, cac ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang xa hoi. dieu hien ((cac lo) or (cac lop)) ((va hanh) OR (va thanh)) lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. dieu hien ((cac lo) OR (cac lop)) ((va hanh) OR (va thanh)) lai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. dieu hien ((cac lo) or (cac lop)) ((va hanh) OR (va thanh)) lai cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. dieu hien ((cac lo) or (cac lop)) ((va hanh) OR (va thanh)) lai cua te*.