Perhaps you should try some spelling variations:
cua tre » cua te, cuu tre, cua triet
truc va » thuc va, thuc vat, trung va
hieu su » hieu sau, tieu su, hieu so
hieu vu » hieu va, hieu ve, dieu vu
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san

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 ky sang ma hoi. ((hieu vu) OR (hieu su)) cham ((truc va) or (tuc xa)) dan vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky sang ma hoi. ((hieu vu) OR (hieu su)) cham ((truc va) OR (tuc xa)) dan vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky sang ma hoi. ((hieu vu) OR (hieu su)) cham ((truc va) or (tuc xa)) dan vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang ma hoi. ((hieu vu) OR (hieu su)) cham ((truc va) or (tuc xa)) dan vi cua tre*.