Perhaps you should try some spelling variations:
nang doi » nang doc, nang noi, hang doi
cham duc » pham duc, cham soc, pham duy
van hanh » van thanh, ban hanh, van anh
cau tren » cu tren, dau tren, ca tren
te sach » toc sach
doi hoi » doi thoi, doi voi, doi moi
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang

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 v nang doi hoi. hieu ve cham duc van hanh vi ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang doi hoi. hieu ve cham duc van hanh vi ((cua tre) OR (cau tren))*.