Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
dang hai » dang khai, hang hai, dung hai
dan khai » dang khai, van khai, dang khoi
doan hai » doanh tai, hoang hai, doan va
cam tuc » cam xuc, cam tu, nam thuc
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang ma hoi. hieu va cam tuc va ((((doan hai) or (dan khai))) or (dang hai)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu va cam tuc va ((((doan hai) OR (dan khai))) OR (dang hai)) su triet.
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu va cam tuc va ((((doan hai) or (dan khai))) or (dang hai)) su triet*.