Perhaps you should try some spelling variations:
van tuan » van quan, van ban, anh tuan
cau tren » cu tren, dau tren, ca tren
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
tuan vi » quan vi, luan vi, quans vi
cuu tre » cua tre, cau treo
va bac » van bac, va cac, va bai
bo van » vo van, so van, do van
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu va bac bo van tuan vi ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang x hoi. hieu va bac bo van tuan vi ((cuu tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: te sach ty nang x hoi. hieu va bac bo van tuan vi ((cuu tre) or (cau tren))*.