Perhaps you should try some spelling variations:
chat triet » chet triet, phat trien, chat thien
thanh hoa » thanh pho
hoa chat » hop chat, hoa phan
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
luc va » duc va, tuc va, loc va
te sac » te cac, te san
ve cac » va cac, vien cac
ma hoi » mai hoi, xa hoi, ma hoa
ve cao » va cao, ve bao, ve co

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) or (te sach)) ky nang ma hoi. hieu ((ve cao) OR (ve cac)) luc va thanh hoa chat triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky nang ma hoi. hieu ((ve cao) OR (ve cac)) luc va thanh hoa chat triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) or (te sach)) ky nang ma hoi. hieu ((ve cao) OR (ve cac)) luc va thanh hoa chat triet".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te sach)) ky nang ma hoi. hieu ((ve cao) OR (ve cac)) luc va thanh hoa chat triet*.