Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
kmay nang » ky nang, kha nang, may nong
may nang » may nong, ky nang, cam nang
thanh va » thanh van, hanh va, thanh ha
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
tuc ban » thuc ban, truc ban, tu ban
va luan » vay luan, van luan, va quan
ve cam » ve cham, ve cac, va cam
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((may nang) or (kmay nang)) xa hoi. hieu ve cam tuc ban thanh va luan thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((may nang) OR (kmay nang)) xa hoi. hieu ve cam tuc ban thanh va luan thiet.
• Adding a wildcard symbol may retrieve word variants: su sach ((may nang) or (kmay nang)) xa hoi. hieu ve cam tuc ban thanh va luan thiet*.