Perhaps you should try some spelling variations:
thanh tay » thanh tai, thanh toan, thanh thuy
thanh tap » thanh lap, thanh tai, thanh tam
hieu van » hieu va, thien van, lieu va
tang tao » sang tao, tang tai, nang tao
tao khoi » tao hoi, thao khoa, lao khoa
toc sac » toc sach, toc san, hoc sach
hieu ve » hieu va
ky tang » ky nang, ky dang, kho tang
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: toc sac ky tang tao khoi. ((hieu ve) OR (hieu van)) pham duc va ((thanh tap) or (thanh tay)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky tang tao khoi. ((hieu ve) OR (hieu van)) pham duc va ((thanh tap) OR (thanh tay)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky tang tao khoi. ((hieu ve) OR (hieu van)) pham duc va ((thanh tap) or (thanh tay)) cua te".
• Adding a wildcard symbol may retrieve word variants: toc sac ky tang tao khoi. ((hieu ve) OR (hieu van)) pham duc va ((thanh tap) or (thanh tay)) cua te*.