Perhaps you should try some spelling variations:
tinh vai » tinh va, tinh bai, tinh lai
cau tren » dau tren, ca tren, cau treo
hieu van » hieu va, thien van, lieu va
tinh hai » tinh thai, tinh chat, trinh han
sach ky » sac ky, sach y, sach ty
te sach » toc sach
van cam » van nam, van lam, van cau
cu tren » tu tren, dua tren
cam tu » cam thu, nam tu, dam tu
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. hieu van cam tu va ((tinh vai) or (tinh hai)) ((cau tren) OR (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x hoi. hieu van cam tu va ((tinh vai) OR (tinh hai)) ((cau tren) OR (cu tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. hieu van cam tu va ((tinh vai) or (tinh hai)) ((cau tren) OR (cu tren))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. hieu van cam tu va ((tinh vai) or (tinh hai)) ((cau tren) OR (cu tren))*.