Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
chat trung » chat trong, ha trung, cua trung
thu sach » thuoc sach, thu hoach, khau sach
hieu van » hieu va, thien van, lieu va
van chat » cao chat
trung va » truong va, trang va, trung ha
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
dan dai » dat dai, can dai, dan dat
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
va dan » ca dan, va dao, va dau

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

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