Perhaps you should try some spelling variations:
van cham » van chat, va cham, van pham
van tham » van thanh, van tuan, van chat
thu sach » thuat sach, thuoc sach, thu hoach
hanh doi » thanh doi, hanh noi, hang doi
doi cua » dai cua, hoi cua, dong cua
va hanh » van hanh, va thanh, va danh
tu sach » su sach, te sach, tu cach
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
xuc va » duc va, tuc va, luc va
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thu sach)) y nang xa hoi. hieu ((van cham) OR (van tham)) xuc va hanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang xa hoi. hieu ((van cham) OR (van tham)) xuc va hanh doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) y nang xa hoi. hieu ((van cham) OR (van tham)) xuc va hanh doi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y nang xa hoi. hieu ((van cham) OR (van tham)) xuc va hanh doi cua tre*.