Perhaps you should try some spelling variations:
trinh vi » trinh va, trinh ve, trinh viet
tu cach » tu cac
cuu ban » cua ban, cuu san, cuu nang
hieu va » lieu va, hieu qua
va cham » va chat, va tham
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (te sach)) ky lang xa hoi. hieu va cham ((cuu ban) OR (cuu van)) trinh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) ky lang xa hoi. hieu va cham ((cuu ban) OR (cuu van)) trinh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (te sach)) ky lang xa hoi. hieu va cham ((cuu ban) OR (cuu van)) trinh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky lang xa hoi. hieu va cham ((cuu ban) OR (cuu van)) trinh vi cuu tre*.