Perhaps you should try some spelling variations:
thanh ban » thanh san, thanh van, thanh bac
hoc sach » hoc sinh, hoc cac, hoc anh
va thanh » gia thanh, ban thanh, va tinh
toc sac » toc sach, toc san, doc sach
nang xa » nang x, lang xa, nang ma
van cam » van lam, van cau, van dam
ban cua » ban quan
xuc va » duc va, tuc va, luc va
cua cu » cua chu, cua cau, cua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sac) OR (hoc sach)) ky nang xa hoi. hieu ((van cam) or (van nam)) xuc va thanh ban cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sac) OR (hoc sach)) ky nang xa hoi. hieu ((van cam) OR (van nam)) xuc va thanh ban cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sac) OR (hoc sach)) ky nang xa hoi. hieu ((van cam) or (van nam)) xuc va thanh ban cua cu".
• Adding a wildcard symbol may retrieve word variants: ((toc sac) OR (hoc sach)) ky nang xa hoi. hieu ((van cam) or (van nam)) xuc va thanh ban cua cu*.