Perhaps you should try some spelling variations:
chat duc » chat xuc, chat doc, chet duoc
vu khach » vu khanh, vu khac, vay khach
kinh van » dinh van, vinh van, binh van
su sach » so sach, vu sach
kinh va » tinh va, sinh va, minh va
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
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: ((su sach) or (vu khach)) y nang xa hoi. hieu ve chat duc va ((kinh va) OR (kinh van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu khach)) y nang xa hoi. hieu ve chat duc va ((kinh va) OR (kinh van)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu khach)) y nang xa hoi. hieu ve chat duc va ((kinh va) OR (kinh van)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu khach)) y nang xa hoi. hieu ve chat duc va ((kinh va) OR (kinh van)) cua tre*.