Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
nam thuc » nam thuoc, am thuc, nam thu
lanh hai » manh hai, thanh hai, lang chai
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, lieu va
hai cau » hai chau, hai chu, hai hau
va lanh » va lang, va danh, va hanh
su sach » so sach
mai hoi » mai khoi, dai hoi, lai hoi
vu sach » vu bach, vu khach
cam tu » cam thu, nam tu, dam tu

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) OR (vu sach)) ky nang mai hoi. hieu van ((cam tu) or (nam thuc)) va lanh hai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang mai hoi. hieu van ((cam tu) OR (nam thuc)) va lanh hai cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ky nang mai hoi. hieu van ((cam tu) or (nam thuc)) va lanh hai cau treo".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) ky nang mai hoi. hieu van ((cam tu) or (nam thuc)) va lanh hai cau treo*.