Perhaps you should try some spelling variations:
nang tai » hang tai, tang tai, sang tai
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu van
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
tai hai » thi hai, dai hai, tai ha
xuc van » duc van, luc van, vuc van
vi cua » vai cua, di cua
tu sac » tu cac, tu san, tu bac
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: ((tu sac) OR (tu sach)) ky nang tai hai. ((hieu ve) or (hieu va)) cam xuc van hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky nang tai hai. ((hieu ve) OR (hieu va)) cam xuc van hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu sach)) ky nang tai hai. ((hieu ve) or (hieu va)) cam xuc van hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu sach)) ky nang tai hai. ((hieu ve) or (hieu va)) cam xuc van hanh vi cua te*.