Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thai » van thoai, van tai, van thi
cua tre » cua te, cuu tre, dua tren
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
van hai » van ha, van chat, van hanh
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va

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. hieu ((van thai) or (van hai)) thuc va dan vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ((van thai) OR (van hai)) thuc va dan vi ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu ((van thai) or (van hai)) thuc va dan vi ((cua tre) or (cua triet))*.