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