Perhaps you should try some spelling variations:
tiep tieng » tap tieng, tien tien, tiep trong
hieu viec » nhieu viec, hieu ve, sieu viet
sach nuoc » sach duoc, cac nuoc, bach tuoc
su sach » so sach, vu 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
va dinh » van dinh, va kinh, va tinh
dinh di » dinh du, dinh vi, danh di
cuu tre » cua tre, cau tren, cau treo
di cuu » di cau, di cua, dinh cuu

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. ((tiep tieng) or (hieu viec)) sach nuoc va dinh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. ((tiep tieng) OR (hieu viec)) sach nuoc va dinh di cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. ((tiep tieng) or (hieu viec)) sach nuoc va dinh di cuu tre*.