Perhaps you should try some spelling variations:
cau tren » dau tren, ca tren, cau treo
dua tren » dung tren
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nam xua » nam cua, nam mua, nam qua
va tinh » may tinh
tinh va » tich va, trinh van, trinh vat
cu tren » tu tren
va nam » van nam, ha nam, va nay
xua va » xuat va, vua va, sua va
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 ky nang x hoi. lieu va nam xua va tinh va ((cau tren) or (((cu tren) OR (dua tren))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x hoi. lieu va nam xua va tinh va ((cau tren) OR (((cu tren) OR (dua tren)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. lieu va nam xua va tinh va ((cau tren) or (((cu tren) OR (dua tren))))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. lieu va nam xua va tinh va ((cau tren) or (((cu tren) OR (dua tren))))*.