Perhaps you should try some spelling variations:
chat trung » chat trong, ha trung, cua trung
toc sach » hoc sach, thuoc sach, nuoc sach
tinh dai » trinh dai, tinh da, tinh hai
doc sach » hoc sach, nuoc sach, dac sac
trung va » truong va, trang va, trung ha
va tinh » may tinh
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
me hoi » le hoi
y nang » ky nang, ly nang, v nang
cua tu » cua tuc, cua su, cua cu

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

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