Perhaps you should try some spelling variations:
chat thien » phat trien, cai thien, phat hien
hoa chat » hop chat, hoa phan
tinh hoa » trinh hoa, tinh hoc, minh hoa
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
va tinh » may tinh
suc va » duc va, tuc va, luc va
te sac » te cac, te san
ve bao » te bao, va bao
ma hoi » mai hoi, xa hoi, ma hoa
ve cao » va cao, ve cac, 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 bao)) suc va tinh hoa chat thien~.
• 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 bao)) suc va tinh hoa chat thien.
• 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 bao)) suc va tinh hoa chat thien".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te sach)) ky nang ma hoi. hieu ((ve cao) OR (ve bao)) suc va tinh hoa chat thien*.