Perhaps you should try some spelling variations:
tinh lai » tinh lao, minh lai, tinh bai
dua tren » dung tren
tinh hai » tinh thai, tinh chat, trinh han
sach ty » sach y, sach tu, sach thu
te sach » toc sach
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang ma hoa. hieu ve cam duc va ((tinh lai) OR (tinh hai)) ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ma hoa. hieu ve cam duc va ((tinh lai) OR (tinh hai)) ((dua tren) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ma hoa. hieu ve cam duc va ((tinh lai) OR (tinh hai)) ((dua tren) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ma hoa. hieu ve cam duc va ((tinh lai) OR (tinh hai)) ((dua tren) or (cuu tre))*.