Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
ve triet » va trien, su triet
nang xa » nang x, lang xa, nang ma
van cam » van nam, van cau, van dam
van lam » van nam
va tinh » may tinh
tinh de » tinh da, sinh de, tinh he
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y nang xa hoi. hieu ((van cam) or (van lam)) tuc va tinh de ((cua tre) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang xa hoi. hieu ((van cam) OR (van lam)) tuc va tinh de ((cua tre) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: toc sach y nang xa hoi. hieu ((van cam) or (van lam)) tuc va tinh de ((cua tre) or (ve triet))*.