Perhaps you should try some spelling variations:
chat trung » chat trong, ha trung, cua trung
danh dai » danh dau, danh di, danh sai
dua tren » dung tren
hieu van » hieu va, thien van, lieu va
van chat » cao chat
trung va » truong va, trang va, trung ha
tu sach » thu sach, su sach, te sach
cua tre » cua te, cua triet, cua thep
va danh » va dinh, va dan, va hanh
cuu tre » cau tren, cau treo
nang xa » nang x, lang xa, nang ma
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 y nang xa hoi. hieu van chat trung va danh dai ((((cua tre) or (dua tren))) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu van chat trung va danh dai ((((cua tre) OR (dua tren))) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu van chat trung va danh dai ((((cua tre) or (dua tren))) or (cuu tre))*.