Perhaps you should try some spelling variations:
thanh dam » thanh dat, thanh nam, thanh tam
van cham » van chat, van tham, va cham
nang cai » nang cao, nang cap, nang can
nang tai » hang tai, tang tai, sang tai
hieu van » hieu va, thien van, lieu va
cham tuc » nham thuc, pham thuc, tham thuc
hanh dao » lanh dao, thanh dat, doanh dao
vu sac » vu sach, vu san, va sac
tuc va » thuc va, truc va, tuc xa
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ky ((nang cai) OR (nang tai)) hoi. hieu van cham tuc va ((hanh dao) or (thanh dam)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky ((nang cai) OR (nang tai)) hoi. hieu van cham tuc va ((hanh dao) OR (thanh dam)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky ((nang cai) OR (nang tai)) hoi. hieu van cham tuc va ((hanh dao) or (thanh dam)) cua te".
• Adding a wildcard symbol may retrieve word variants: vu sac ky ((nang cai) OR (nang tai)) hoi. hieu van cham tuc va ((hanh dao) or (thanh dam)) cua te*.