Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
cuc tre » duc tre, cua tre, cuu tre
duc van » duc va, duc tan, duc manh
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » vien cac
su tai » su thi, tu tai
su sai » su hai, su dai, su mai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sai) or (su tai)) ky nang ma hoi. hieu ((ve cac) OR (va cac)) duc van hanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sai) OR (su tai)) ky nang ma hoi. hieu ((ve cac) OR (va cac)) duc van hanh tai cuc tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sai) or (su tai)) ky nang ma hoi. hieu ((ve cac) OR (va cac)) duc van hanh tai cuc tre*".