Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
tinh vai » tinh va, tinh hai, tinh bai
cham luc » cham soc, nhan luc, cham cuu
cua tre » cua te, cuu tre, cua triet
va tinh » may tinh
sach ty » sach y, sach tu, sach thu
te sach » toc sach
hieu ve » hieu va, hieu van
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
ve cham » va cham, ve chat, vu cham
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty ((nang ma) or (sang ma)) hoi. hieu ve cham luc va tinh vai ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang ma) OR (sang ma)) hoi. hieu ve cham luc va tinh vai ((cua tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang ma) or (sang ma)) hoi. hieu ve cham luc va tinh vai ((cua tre) or (cau tren))*.